proxy_add_caching

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of behavioral disclosure, and it carries none. The description never states whether the tool modifies files in the project directory, what side effects it has, whether an existing caching configuration is overwritten, or what the api_key parameter is used for. For a tool that appears to interact with external services (api_key param), this is a serious omission.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is short (five words), but this is under-specification, not concise effectiveness. Every word merely echoes the tool name and none of them earns its place by conveying new, decision-relevant information. Compared to the calibration standard where a stripped-down definition still scores 2, this one is equally uninformative.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool has an undocumented api_key parameter (suggesting external service integration), no output schema, no annotations, and a crowded sibling space of caching- and proxy-related tools. The description explains none of the required inputs, the integration context, the generated artifacts, or the relationship to proxy_generate_server/proxy_add_routing. An agent cannot tell what this tool does, what it needs, or what it will change.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is only 50% — 'directory' is documented as 'Project directory' but 'api_key' has no description at all. The tool description adds zero parameter context: it does not explain what directory refers to in the caching context, nor whether api_key is required, which provider it belongs to, or what happens if omitted. With coverage at the 50% boundary and no compensatory detail in the description, the agent cannot confidently populate the parameters.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description, 'Add proxy caching layer,' is a near-verbatim restatement of the tool name 'proxy_add_caching' — it adds almost no information beyond the name itself. It does not specify what kind of proxy (nginx, CDN, reverse proxy), what is cached, or what 'add' concretely produces (config files, middleware, infrastructure). This is tautology rather than a clarifying statement of purpose.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is given for when to use this tool versus its many close siblings. With alternatives like http_add_caching, gha_add_caching, qbatch_add_caching, redis_setup_caching, cache_generate_redis, and proxy_add_routing in the sibling list, the agent cannot determine which caching scenario this tool targets. No context, no exclusions, and no alternatives are mentioned.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.