search.fetch

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

With no annotations provided, the description carries the full burden. It only mentions fetching 'as text' but does not disclose important behaviors such as redirect handling, timeout limits, error responses, or whether the tool follows best practices like setting user-agent. Minimal behavioral transparency.

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 very concise—one sentence that gets straight to the point. However, it is so brief that it sacrifices necessary detail. Still, every word earns its place; no fluff.

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?

Given the tool's network I/O nature and no output schema, the description is incomplete. It fails to mention failure modes, response handling, or any limitations. For a tool that fetches external resources, more context is needed.

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?

The schema has one parameter 'url' with 0% description coverage. The description adds the constraint that it must be an HTTP/HTTPS URL, which provides some additional meaning beyond the schema. However, no further details (e.g., query parameters, headers, or formatting) are given, so the addition is minimal.

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 (Fetch) and the resource (HTTP/HTTPS URL) and the output format (as text). It distinguishes this tool from siblings like search.web, which likely involves searching the web rather than fetching a specific URL.

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 provided on when to use this tool versus alternatives, nor any conditions or prerequisites. The description simply states what the tool does without context for decision-making.

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