Warm up CDN cache

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

Annotations already declare idempotentHint=true and destructiveHint=false, covering the safety profile. The description adds that it warms the cache for given paths and optionally per compression method, but it does not disclose additional behavioral traits such as origin fetch side effects, rate limits, or whether the operation is asynchronous.

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 a single, front-loaded sentence that directly states the tool's purpose and optional parameter. No fluff or repetition, every word earns its place.

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?

For a simple tool with three well-documented parameters, strong annotations (idempotent, non-destructive), and no output schema or nested objects, the description is largely complete. The only minor gap is that it does not mention the return value or whether the operation is asynchronous, but this is not critical given how well the schema and annotations cover the details.

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 100%, with each parameter already having a descriptive definition (paths, resource_id, compression_methods). The description only summarizes these, adding no new semantic detail beyond what the schema already provides, so the baseline 3 applies.

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 clearly states the action (Pre-fetch/warm up), the target resource (aCDN resource cache), and the scope (given paths, optionally per compression method). This distinguishes it from sibling tools like purge_cache (which invalidates cache) and list/get tools (which read).

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?

The description implies usage through the term 'pre-fetch' (i.e., use when you want to proactively populate the cache), but it does not explicitly state when to use this tool versus alternatives like purge_cache, nor does it mention prerequisites (e.g., compression method must be enabled on the resource).

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