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

With no annotations provided, the description carries the full burden of disclosing behavior. It does disclose that the body is discarded, which is useful, but it omits critical behavioral details such as network method, redirect handling, timeout behavior, response format, or whether any parameters beyond url are even relevant. This is insufficient for an unannotated tool with 9 optional parameters.

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: two short sentences with no filler, and the primary action ('HTTP status') is front-loaded. 'Body discarded.' earns its place by adding useful behavioral information. It is not penalized heavily for brevity because the conciseness dimension rewards efficiency, though the brevity does hurt completeness elsewhere.

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?

This tool has 9 optional parameters, no output schema, and no annotations, so the description must provide substantial orientation. It only mentions HTTP status and body discard, never explaining how the many parameters relate to the stated purpose, what the expected output shape is, or which parameter to supply for a library docs URL. This is materially inadequate for an agent to invoke the tool correctly.

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%, and each parameter already has its own explanatory text, so the schema does the heavy lifting. The description adds no parameter-level meaning and does not clarify which parameter maps to the 'public library docs URL' concept, but the baseline of 3 is appropriate given complete schema coverage.

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 states a concrete action—return an HTTP status for a URL—and notes that the body is discarded. However, it never defines what counts as a 'public library docs URL,' and the 9-parameter schema includes unrelated fields such as city, json, feed, and query, so an agent cannot confidently determine the tool's true scope from the description alone.

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 siblings like fetch-status, browser-url-ok, or web-fetch. The phrase 'public library docs URL' implies a narrow use case, but there is no explicit when-to-use/when-not-to-use instruction or mention of alternatives.

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