diff --git a/packages/api/src/agents/index.ts b/packages/api/src/agents/index.ts
index 53f7f60a93..fbc46bfb3e 100644
--- a/packages/api/src/agents/index.ts
+++ b/packages/api/src/agents/index.ts
@@ -19,3 +19,4 @@ export * from './tools';
 export * from './validation';
 export * from './added';
 export * from './load';
+export * from './toolTokens';
diff --git a/packages/api/src/agents/run.ts b/packages/api/src/agents/run.ts
index b6b5e6a14d..1b67f2b337 100644
--- a/packages/api/src/agents/run.ts
+++ b/packages/api/src/agents/run.ts
@@ -1,3 +1,4 @@
+import { logger } from '@librechat/data-schemas';
 import { Run, Providers, Constants } from '@librechat/agents';
 import { providerEndpointMap, KnownEndpoints } from 'librechat-data-provider';
 import type {
@@ -18,6 +19,7 @@ import type { BaseMessage } from '@langchain/core/messages';
 import type { IUser } from '@librechat/data-schemas';
 import type * as t from '~/types';
 import { resolveHeaders, createSafeUser } from '~/utils/env';
+import { getOrComputeToolTokens } from './toolTokens';
 
 /** Expected shape of JSON tool search results */
 interface ToolSearchJsonResult {
@@ -295,8 +297,7 @@ export async function createRun({
       ? extractDiscoveredToolsFromHistory(messages)
       : new Set<string>();
 
-  const agentInputs: AgentInputs[] = [];
-  const buildAgentContext = (agent: RunAgent) => {
+  const buildAgentContext = async (agent: RunAgent): Promise<AgentInputs> => {
     const provider =
       (providerEndpointMap[
         agent.provider as keyof typeof providerEndpointMap
@@ -381,11 +382,24 @@ export async function createRun({
       agent.maxContextTokens,
     );
 
+    let toolSchemaTokens: number | undefined;
+    if (tokenCounter) {
+      toolSchemaTokens = await getOrComputeToolTokens({
+        tools: agent.tools,
+        toolDefinitions,
+        provider,
+        clientOptions: llmConfig,
+        tokenCounter,
+        tenantId: user?.tenantId,
+      });
+    }
+
     const reasoningKey = getReasoningKey(provider, llmConfig, agent.endpoint);
     const agentInput: AgentInputs = {
       provider,
       reasoningKey,
       toolDefinitions,
+      toolSchemaTokens,
       agentId: agent.id,
       tools: agent.tools,
       clientOptions: llmConfig,
@@ -401,11 +415,35 @@ export async function createRun({
       contextPruningConfig: summarization.contextPruning,
       maxToolResultChars: agent.maxToolResultChars,
     };
-    agentInputs.push(agentInput);
+    return agentInput;
   };
 
-  for (const agent of agents) {
-    buildAgentContext(agent);
+  const settled = await Promise.allSettled(agents.map(buildAgentContext));
+  const agentInputs: AgentInputs[] = [];
+  for (let i = 0; i < settled.length; i++) {
+    const result = settled[i];
+    if (result.status === 'fulfilled') {
+      agentInputs.push(result.value);
+    } else {
+      logger.error(`[createRun] buildAgentContext failed for agent ${agents[i].id}`, result.reason);
+    }
+  }
+
+  if (agentInputs.length === 0) {
+    throw new Error(
+      `[createRun] All ${agents.length} agent(s) failed to initialize; cannot create run`,
+    );
+  }
+
+  const hasEdges = (agents[0].edges?.length ?? 0) > 0;
+  if (agentInputs.length < agents.length && hasEdges) {
+    const failedIds = agents
+      .filter((_, i) => settled[i].status === 'rejected')
+      .map((a) => a.id)
+      .join(', ');
+    throw new Error(
+      `[createRun] Agent(s) [${failedIds}] failed in a routed multi-agent run; cannot proceed with partial graph`,
+    );
   }
 
   const graphConfig: RunConfig['graphConfig'] = {
diff --git a/packages/api/src/agents/toolTokens.spec.ts b/packages/api/src/agents/toolTokens.spec.ts
new file mode 100644
index 0000000000..8d324ea58b
--- /dev/null
+++ b/packages/api/src/agents/toolTokens.spec.ts
@@ -0,0 +1,412 @@
+import { z } from 'zod';
+import { DynamicStructuredTool } from '@langchain/core/tools';
+import {
+  Providers,
+  ANTHROPIC_TOOL_TOKEN_MULTIPLIER,
+  DEFAULT_TOOL_TOKEN_MULTIPLIER,
+} from '@librechat/agents';
+
+import type { GenericTool, LCTool, TokenCounter } from '@librechat/agents';
+
+import { collectToolSchemas, computeToolSchemaTokens, getOrComputeToolTokens } from './toolTokens';
+
+/* ---------- Mock standardCache with hoisted get/set for per-test overrides ---------- */
+const mockCacheStore = new Map<string, unknown>();
+const mockGet = jest.fn((key: string) => Promise.resolve(mockCacheStore.get(key)));
+const mockSet = jest.fn((key: string, value: unknown) => {
+  mockCacheStore.set(key, value);
+  return Promise.resolve(true);
+});
+
+jest.mock('~/cache', () => ({
+  standardCache: jest.fn(() => ({ get: mockGet, set: mockSet })),
+}));
+
+jest.mock('@librechat/data-schemas', () => ({
+  logger: { debug: jest.fn(), error: jest.fn(), warn: jest.fn(), info: jest.fn() },
+}));
+
+/* ---------- Helpers ---------- */
+
+function makeTool(name: string, description = `${name} description`): GenericTool {
+  return new DynamicStructuredTool({
+    name,
+    description,
+    schema: z.object({ input: z.string().optional() }),
+    func: async () => 'ok',
+  }) as unknown as GenericTool;
+}
+
+function makeMcpTool(name: string): GenericTool {
+  const tool = makeTool(name) as unknown as Record<string, unknown>;
+  tool.mcp = true;
+  return tool as unknown as GenericTool;
+}
+
+function makeToolDef(name: string, opts?: Partial<LCTool>): LCTool {
+  return {
+    name,
+    description: opts?.description ?? `${name} description`,
+    parameters: opts?.parameters ?? { type: 'object', properties: { input: { type: 'string' } } },
+    ...opts,
+  };
+}
+
+/** Token counter that returns the string length of message content (deterministic). */
+const fakeTokenCounter: TokenCounter = (msg) => {
+  const content = typeof msg.content === 'string' ? msg.content : JSON.stringify(msg.content);
+  return content.length;
+};
+
+beforeEach(() => {
+  mockCacheStore.clear();
+  mockGet.mockImplementation((key: string) => Promise.resolve(mockCacheStore.get(key)));
+  mockSet.mockImplementation((key: string, value: unknown) => {
+    mockCacheStore.set(key, value);
+    return Promise.resolve(true);
+  });
+});
+
+/* ========================================================================= */
+/*  collectToolSchemas                                                       */
+/* ========================================================================= */
+
+describe('collectToolSchemas', () => {
+  it('returns empty array when no tools provided', () => {
+    expect(collectToolSchemas()).toHaveLength(0);
+    expect(collectToolSchemas([], [])).toHaveLength(0);
+  });
+
+  it('collects entries from GenericTool array', () => {
+    const entries = collectToolSchemas([makeTool('alpha'), makeTool('beta')]);
+    expect(entries).toHaveLength(2);
+    expect(entries.map((e) => e.cacheKey)).toEqual(
+      expect.arrayContaining(['alpha:builtin', 'beta:builtin']),
+    );
+  });
+
+  it('collects entries from LCTool definitions with toolType', () => {
+    const defs = [makeToolDef('x', { toolType: 'mcp' }), makeToolDef('y', { toolType: 'action' })];
+    const entries = collectToolSchemas(undefined, defs);
+    expect(entries).toHaveLength(2);
+    expect(entries[0].cacheKey).toBe('x:mcp');
+    expect(entries[1].cacheKey).toBe('y:action');
+  });
+
+  it('defaults toolType to builtin for LCTool without toolType', () => {
+    const entries = collectToolSchemas(undefined, [makeToolDef('z')]);
+    expect(entries[0].cacheKey).toBe('z:builtin');
+  });
+
+  it('uses mcp type for GenericTool with mcp flag', () => {
+    const entries = collectToolSchemas([makeMcpTool('search')]);
+    expect(entries[0].cacheKey).toBe('search:mcp');
+  });
+
+  it('deduplicates: GenericTool takes precedence over matching toolDefinition', () => {
+    const tools = [makeTool('shared')];
+    const defs = [makeToolDef('shared'), makeToolDef('only_def')];
+    const entries = collectToolSchemas(tools, defs);
+    expect(entries).toHaveLength(2);
+    const keys = entries.map((e) => e.cacheKey);
+    expect(keys).toContain('shared:builtin');
+    expect(keys).toContain('only_def:builtin');
+  });
+});
+
+/* ========================================================================= */
+/*  computeToolSchemaTokens                                                  */
+/* ========================================================================= */
+
+describe('computeToolSchemaTokens', () => {
+  it('returns 0 when no tools provided', () => {
+    expect(
+      computeToolSchemaTokens(undefined, undefined, Providers.OPENAI, undefined, fakeTokenCounter),
+    ).toBe(0);
+    expect(computeToolSchemaTokens([], [], Providers.OPENAI, undefined, fakeTokenCounter)).toBe(0);
+  });
+
+  it('counts tokens from GenericTool schemas', () => {
+    const result = computeToolSchemaTokens(
+      [makeTool('test_tool')],
+      undefined,
+      Providers.OPENAI,
+      undefined,
+      fakeTokenCounter,
+    );
+    expect(result).toBeGreaterThan(0);
+  });
+
+  it('counts tokens from LCTool definitions', () => {
+    const result = computeToolSchemaTokens(
+      undefined,
+      [makeToolDef('test_def')],
+      Providers.OPENAI,
+      undefined,
+      fakeTokenCounter,
+    );
+    expect(result).toBeGreaterThan(0);
+  });
+
+  it('deduplicates: tool counted from tools array is skipped in toolDefinitions', () => {
+    const tools = [makeTool('shared')];
+    const defs = [makeToolDef('shared')];
+
+    const toolsOnly = computeToolSchemaTokens(
+      tools,
+      undefined,
+      Providers.OPENAI,
+      undefined,
+      fakeTokenCounter,
+    );
+    const both = computeToolSchemaTokens(
+      tools,
+      defs,
+      Providers.OPENAI,
+      undefined,
+      fakeTokenCounter,
+    );
+    expect(both).toBe(toolsOnly);
+  });
+
+  it('applies Anthropic multiplier for Anthropic provider', () => {
+    const defs = [makeToolDef('tool')];
+    const openai = computeToolSchemaTokens(
+      undefined,
+      defs,
+      Providers.OPENAI,
+      undefined,
+      fakeTokenCounter,
+    );
+    const anthropic = computeToolSchemaTokens(
+      undefined,
+      defs,
+      Providers.ANTHROPIC,
+      undefined,
+      fakeTokenCounter,
+    );
+    const expectedRatio = ANTHROPIC_TOOL_TOKEN_MULTIPLIER / DEFAULT_TOOL_TOKEN_MULTIPLIER;
+    expect(anthropic / openai).toBeCloseTo(expectedRatio, 1);
+  });
+
+  it('applies Anthropic multiplier when model name contains "claude"', () => {
+    const defs = [makeToolDef('tool')];
+    const result = computeToolSchemaTokens(
+      undefined,
+      defs,
+      Providers.OPENAI,
+      { model: 'claude-3-opus' },
+      fakeTokenCounter,
+    );
+    const defaultResult = computeToolSchemaTokens(
+      undefined,
+      defs,
+      Providers.OPENAI,
+      undefined,
+      fakeTokenCounter,
+    );
+    expect(result).toBeGreaterThan(defaultResult);
+  });
+
+  it('does not apply Anthropic multiplier for Bedrock even with claude model', () => {
+    const defs = [makeToolDef('tool')];
+    const bedrock = computeToolSchemaTokens(
+      undefined,
+      defs,
+      Providers.BEDROCK,
+      { model: 'claude-3-opus' },
+      fakeTokenCounter,
+    );
+    const defaultResult = computeToolSchemaTokens(
+      undefined,
+      defs,
+      Providers.OPENAI,
+      undefined,
+      fakeTokenCounter,
+    );
+    expect(bedrock).toBe(defaultResult);
+  });
+});
+
+/* ========================================================================= */
+/*  getOrComputeToolTokens                                                   */
+/* ========================================================================= */
+
+describe('getOrComputeToolTokens', () => {
+  it('returns 0 when no tools provided', async () => {
+    const result = await getOrComputeToolTokens({
+      provider: Providers.OPENAI,
+      tokenCounter: fakeTokenCounter,
+    });
+    expect(result).toBe(0);
+  });
+
+  it('computes and caches each tool individually on first call', async () => {
+    const defs = [makeToolDef('tool_a'), makeToolDef('tool_b')];
+    const result = await getOrComputeToolTokens({
+      toolDefinitions: defs,
+      provider: Providers.OPENAI,
+      tokenCounter: fakeTokenCounter,
+    });
+
+    expect(result).toBeGreaterThan(0);
+    expect(mockCacheStore.has('tool_a:builtin')).toBe(true);
+    expect(mockCacheStore.has('tool_b:builtin')).toBe(true);
+    expect(mockCacheStore.size).toBe(2);
+  });
+
+  it('uses cached per-tool values on second call without recomputing', async () => {
+    const defs = [makeToolDef('tool_a')];
+    const counter = jest.fn(fakeTokenCounter);
+
+    const first = await getOrComputeToolTokens({
+      toolDefinitions: defs,
+      provider: Providers.OPENAI,
+      tokenCounter: counter,
+    });
+
+    const callCountAfterFirst = counter.mock.calls.length;
+
+    const second = await getOrComputeToolTokens({
+      toolDefinitions: defs,
+      provider: Providers.OPENAI,
+      tokenCounter: counter,
+    });
+
+    expect(second).toBe(first);
+    expect(counter.mock.calls.length).toBe(callCountAfterFirst);
+  });
+
+  it('applies different multipliers for different providers on same cached raw counts', async () => {
+    const defs = [makeToolDef('tool')];
+
+    const openai = await getOrComputeToolTokens({
+      toolDefinitions: defs,
+      provider: Providers.OPENAI,
+      tokenCounter: fakeTokenCounter,
+    });
+
+    const anthropic = await getOrComputeToolTokens({
+      toolDefinitions: defs,
+      provider: Providers.ANTHROPIC,
+      tokenCounter: fakeTokenCounter,
+    });
+
+    expect(openai).not.toBe(anthropic);
+    expect(mockCacheStore.size).toBe(1);
+  });
+
+  it('only computes new tools when tool set grows', async () => {
+    const counter = jest.fn(fakeTokenCounter);
+
+    await getOrComputeToolTokens({
+      toolDefinitions: [makeToolDef('tool_a')],
+      provider: Providers.OPENAI,
+      tokenCounter: counter,
+    });
+    const callsAfterFirst = counter.mock.calls.length;
+
+    await getOrComputeToolTokens({
+      toolDefinitions: [makeToolDef('tool_a'), makeToolDef('tool_b')],
+      provider: Providers.OPENAI,
+      tokenCounter: counter,
+    });
+
+    expect(counter.mock.calls.length).toBe(callsAfterFirst + 1);
+    expect(mockCacheStore.size).toBe(2);
+  });
+
+  it('scopes cache keys by tenantId when provided', async () => {
+    const defs = [makeToolDef('tool')];
+
+    await getOrComputeToolTokens({
+      toolDefinitions: defs,
+      provider: Providers.OPENAI,
+      tokenCounter: fakeTokenCounter,
+      tenantId: 'tenant_123',
+    });
+
+    expect(mockCacheStore.has('tenant_123:tool:builtin')).toBe(true);
+  });
+
+  it('separates cache entries for different tenants', async () => {
+    const defs = [makeToolDef('tool')];
+
+    const t1 = await getOrComputeToolTokens({
+      toolDefinitions: defs,
+      provider: Providers.OPENAI,
+      tokenCounter: fakeTokenCounter,
+      tenantId: 'tenant_1',
+    });
+
+    const t2 = await getOrComputeToolTokens({
+      toolDefinitions: defs,
+      provider: Providers.OPENAI,
+      tokenCounter: fakeTokenCounter,
+      tenantId: 'tenant_2',
+    });
+
+    expect(t1).toBe(t2);
+    expect(mockCacheStore.has('tenant_1:tool:builtin')).toBe(true);
+    expect(mockCacheStore.has('tenant_2:tool:builtin')).toBe(true);
+    expect(mockCacheStore.size).toBe(2);
+  });
+
+  it('caches mcp tools with mcp type in key', async () => {
+    const defs = [makeToolDef('search', { toolType: 'mcp' })];
+
+    await getOrComputeToolTokens({
+      toolDefinitions: defs,
+      provider: Providers.OPENAI,
+      tokenCounter: fakeTokenCounter,
+    });
+
+    expect(mockCacheStore.has('search:mcp')).toBe(true);
+  });
+
+  it('falls back to compute when cache read throws', async () => {
+    mockGet.mockRejectedValueOnce(new Error('Redis down'));
+
+    const result = await getOrComputeToolTokens({
+      toolDefinitions: [makeToolDef('tool')],
+      provider: Providers.OPENAI,
+      tokenCounter: fakeTokenCounter,
+    });
+
+    expect(result).toBeGreaterThan(0);
+    expect(mockGet).toHaveBeenCalled();
+  });
+
+  it('does not throw when cache write fails', async () => {
+    mockSet.mockRejectedValueOnce(new Error('Redis write error'));
+
+    const result = await getOrComputeToolTokens({
+      toolDefinitions: [makeToolDef('tool_write_fail')],
+      provider: Providers.OPENAI,
+      tokenCounter: fakeTokenCounter,
+    });
+
+    expect(result).toBeGreaterThan(0);
+    expect(mockSet).toHaveBeenCalled();
+  });
+
+  it('matches computeToolSchemaTokens output for same inputs', async () => {
+    const defs = [makeToolDef('a'), makeToolDef('b'), makeToolDef('c')];
+
+    const cached = await getOrComputeToolTokens({
+      toolDefinitions: defs,
+      provider: Providers.OPENAI,
+      tokenCounter: fakeTokenCounter,
+    });
+
+    const direct = computeToolSchemaTokens(
+      undefined,
+      defs,
+      Providers.OPENAI,
+      undefined,
+      fakeTokenCounter,
+    );
+
+    expect(cached).toBe(direct);
+  });
+});
diff --git a/packages/api/src/agents/toolTokens.ts b/packages/api/src/agents/toolTokens.ts
new file mode 100644
index 0000000000..4a95b07600
--- /dev/null
+++ b/packages/api/src/agents/toolTokens.ts
@@ -0,0 +1,201 @@
+import { logger } from '@librechat/data-schemas';
+import { SystemMessage } from '@langchain/core/messages';
+import { CacheKeys, Time } from 'librechat-data-provider';
+import {
+  Providers,
+  toJsonSchema,
+  ANTHROPIC_TOOL_TOKEN_MULTIPLIER,
+  DEFAULT_TOOL_TOKEN_MULTIPLIER,
+} from '@librechat/agents';
+
+import type { GenericTool, LCTool, TokenCounter, ClientOptions } from '@librechat/agents';
+import type { Keyv } from 'keyv';
+
+import { standardCache } from '~/cache';
+
+interface ToolEntry {
+  cacheKey: string;
+  json: string;
+}
+
+/** Module-level cache instance, lazily initialized. */
+let toolTokenCache: Keyv | undefined;
+
+function getCache(): Keyv {
+  if (!toolTokenCache) {
+    toolTokenCache = standardCache(CacheKeys.TOOL_TOKENS, Time.THIRTY_MINUTES);
+  }
+  return toolTokenCache;
+}
+
+export function getToolTokenMultiplier(provider: Providers, clientOptions?: ClientOptions): number {
+  const isAnthropic =
+    provider !== Providers.BEDROCK &&
+    (provider === Providers.ANTHROPIC ||
+      /anthropic|claude/i.test(
+        String((clientOptions as { model?: string } | undefined)?.model ?? ''),
+      ));
+  return isAnthropic ? ANTHROPIC_TOOL_TOKEN_MULTIPLIER : DEFAULT_TOOL_TOKEN_MULTIPLIER;
+}
+
+/** Serializes a GenericTool to a JSON string for token counting. Returns null if no schema. */
+function serializeGenericTool(tool: GenericTool): { name: string; json: string } | null {
+  const genericTool = tool as unknown as Record<string, unknown>;
+  const toolName = (genericTool.name as string | undefined) ?? '';
+  if (genericTool.schema == null || typeof genericTool.schema !== 'object') {
+    return null;
+  }
+  const jsonSchema = toJsonSchema(
+    genericTool.schema,
+    toolName,
+    (genericTool.description as string | undefined) ?? '',
+  );
+  return { name: toolName, json: JSON.stringify(jsonSchema) };
+}
+
+/** Serializes an LCTool definition to a JSON string for token counting. */
+function serializeToolDef(def: LCTool): string {
+  return JSON.stringify({
+    type: 'function',
+    function: {
+      name: def.name,
+      description: def.description ?? '',
+      parameters: def.parameters ?? {},
+    },
+  });
+}
+
+/**
+ * Builds a list of tool entries with cache keys and serialized schemas.
+ * Deduplicates: a tool present in `tools` (with a schema) takes precedence
+ * over a matching `toolDefinitions` entry.
+ *
+ * Cache key includes toolType when available (from LCTool) to differentiate
+ * builtin/mcp/action tools that may share a name.
+ * GenericTool entries use the `mcp` flag when present.
+ */
+export function collectToolSchemas(tools?: GenericTool[], toolDefinitions?: LCTool[]): ToolEntry[] {
+  const seen = new Set<string>();
+  const entries: ToolEntry[] = [];
+
+  if (tools) {
+    for (const tool of tools) {
+      const result = serializeGenericTool(tool);
+      if (!result || !result.name) {
+        continue;
+      }
+      seen.add(result.name);
+      const toolType =
+        (tool as unknown as Record<string, unknown>).mcp === true ? 'mcp' : 'builtin';
+      entries.push({ cacheKey: `${result.name}:${toolType}`, json: result.json });
+    }
+  }
+
+  if (toolDefinitions) {
+    for (const def of toolDefinitions) {
+      if (!def.name || seen.has(def.name)) {
+        continue;
+      }
+      seen.add(def.name);
+      const toolType = def.toolType ?? 'builtin';
+      entries.push({ cacheKey: `${def.name}:${toolType}`, json: serializeToolDef(def) });
+    }
+  }
+
+  return entries;
+}
+
+/**
+ * Computes tool schema tokens from scratch using the provided token counter.
+ * Mirrors the logic in AgentContext.calculateInstructionTokens().
+ */
+export function computeToolSchemaTokens(
+  tools: GenericTool[] | undefined,
+  toolDefinitions: LCTool[] | undefined,
+  provider: Providers,
+  clientOptions: ClientOptions | undefined,
+  tokenCounter: TokenCounter,
+): number {
+  const entries = collectToolSchemas(tools, toolDefinitions);
+  let rawTokens = 0;
+  for (const { json } of entries) {
+    rawTokens += tokenCounter(new SystemMessage(json));
+  }
+  const multiplier = getToolTokenMultiplier(provider, clientOptions);
+  return Math.ceil(rawTokens * multiplier);
+}
+
+/**
+ * Returns tool schema tokens, using per-tool caching to avoid redundant
+ * token counting. Each tool's raw (pre-multiplier) token count is cached
+ * individually, keyed by `{tenantId}:{name}:{toolType}` (or `{name}:{toolType}`
+ * without tenant). The provider-specific multiplier is applied to the sum.
+ *
+ * Returns 0 if there are no tools.
+ */
+export async function getOrComputeToolTokens({
+  tools,
+  toolDefinitions,
+  provider,
+  clientOptions,
+  tokenCounter,
+  tenantId,
+}: {
+  tools?: GenericTool[];
+  toolDefinitions?: LCTool[];
+  provider: Providers;
+  clientOptions?: ClientOptions;
+  tokenCounter: TokenCounter;
+  tenantId?: string;
+}): Promise<number> {
+  const entries = collectToolSchemas(tools, toolDefinitions);
+  if (entries.length === 0) {
+    return 0;
+  }
+
+  const keyPrefix = tenantId ? `${tenantId}:` : '';
+
+  let cache: Keyv | undefined;
+  try {
+    cache = getCache();
+  } catch (err) {
+    logger.debug('[toolTokens] Cache init failed, computing fresh', err);
+  }
+
+  let rawTotal = 0;
+  const toWrite: Array<{ key: string; value: number }> = [];
+
+  for (const { cacheKey, json } of entries) {
+    const fullKey = `${keyPrefix}${cacheKey}`;
+    let rawCount: number | undefined;
+
+    if (cache) {
+      try {
+        rawCount = (await cache.get(fullKey)) as number | undefined;
+      } catch {
+        // Cache read failed for this tool — will compute fresh
+      }
+    }
+
+    if (rawCount == null || rawCount <= 0) {
+      rawCount = tokenCounter(new SystemMessage(json));
+      if (rawCount > 0 && cache) {
+        toWrite.push({ key: fullKey, value: rawCount });
+      }
+    }
+
+    rawTotal += rawCount;
+  }
+
+  // Fire-and-forget cache writes for newly computed tools
+  if (cache && toWrite.length > 0) {
+    for (const { key, value } of toWrite) {
+      cache.set(key, value).catch((err: unknown) => {
+        logger.debug(`[toolTokens] Cache write failed for ${key}`, err);
+      });
+    }
+  }
+
+  const multiplier = getToolTokenMultiplier(provider, clientOptions);
+  return Math.ceil(rawTotal * multiplier);
+}
diff --git a/packages/data-provider/src/config.ts b/packages/data-provider/src/config.ts
index ca40ec2c8c..dbed903a69 100644
--- a/packages/data-provider/src/config.ts
+++ b/packages/data-provider/src/config.ts
@@ -1564,6 +1564,11 @@ export enum CacheKeys {
    * Key for admin panel OAuth exchange codes (one-time-use, short TTL).
    */
   ADMIN_OAUTH_EXCHANGE = 'ADMIN_OAUTH_EXCHANGE',
+  /**
+   * Key for cached tool schema token counts.
+   * Keyed by provider + tool fingerprint to avoid redundant token counting.
+   */
+  TOOL_TOKENS = 'TOOL_TOKENS',
 }
 
 /**