[composio/anthropic] cacheTools option overflows Anthropic's 4-breakpoint cache limit

## Observed symptom [Bug]: `@composio/anthropic`'s `cacheTools` option overflows Anthropic's 4-breakpoint limit ### SDK Language TypeScript / Node.js SDK (`@composio/core`) ### SDK Version @composio/anthropic@0.11.3 ### Runtime Environment Node.js (any supported version) ### Environment Local Development ### Describe the Bug `AnthropicProvider({ cacheTools: true }).wrapTools(tools)` (`ts/packages/providers/anthropic/src/index.ts`, `wrapTools`) attaches a `cache_control: { type: 'ephemeral' }` breakpoint to **every** wrapped tool: ```ts override wrapTools(tools: ComposioTool[]): AnthropicToolCollection { return tools.map(tool => this.wrapTool(tool)); } ``` Anthropic's Messages API allows **at most 4 `cache_control` breakpoints per request**, shared across the system prompt, tools, and message history (https://platform.claude.com/docs/en/build-with-claude/prompt-caching). A breakpoint cac ## Literal error text ``` 4-breakpoint limit ``` ## Environment GitHub issue ComposioHQ/composio #4723; state=open ## Trigger / context ### SDK Language TypeScript / Node.js SDK (`@composio/core`) ### SDK Version @composio/anthropic@0.11.3 ### Runtime Environment Node.js (any supported version) ### Environment Local Development ### Describe the Bug `AnthropicProvider({ cacheTools: true }).wrapTools(tools)` (`ts/packages/providers/anthropic/src/index.ts`, `wrapTools`) attaches a `cache_control: { type: 'ephemeral' }` breakpoint to **every** wrapped tool: ```ts override wrapTools(tools: ComposioTool[]): AnthropicToolCollection { return tools.map(tool => this.wrapTool(tool)); } ``` Anthropic's Messages API allows **at most 4 `cache_control` breakpoints per request**, shared across the system prompt, tools, and message history (https://platform.claude.com/docs/en/build-with-claude/prompt-caching). A breakpoint caches every block up to and including it, so caching an entire tool list only ever needs **one** breakpoint — on the last tool. Attaching one to every tool instead means any caller who enables `cacheTools` with 5 or more tools exceeds the 4-breakpoint cap and the whole request is rejected by Anthropic with a 400, which is worse than not caching at all. ### Steps to Reproduce 1. `new AnthropicProvider({ cacheTools: true })` 2. `provider.wrapTools(fiveOrMoreTools)` 3. Send the result as the `tools` array in an `anthropic.messages.create(...)` call alongside any cached system prompt or message content. 4. Anthropic rejects the request once the total breakpoint count across system + tools + ## Source evidence - https://github.com/ComposioHQ/composio/issues/4723 (2026-10-01T11:54:31Z) — GitHub issue #4723 (open) ## Freshness - classification: FRESH_7D - retrieved_at: 2026-10-02T09:39:37.643698Z - scout_id: Ce8554557aa ## Scout notes This Problem was published by the KFA Fresh Friction Scout from public sources. It describes an observed failure signature for agent retrieval; it is not a Solution or Outcome.