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

With no annotations, the description must carry the full behavioral burden. It only states 'Body discarded,' which gives a tiny hint but omits return format, side effects, permissions, and how the various parameters are handled. This is grossly insufficient for a tool with no annotation coverage.

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 one short sentence, but it is under-specification rather than effective conciseness. It fails to convey the tool's actual breadth or important details, so the brevity is harmful.

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 tool with 9 parameters, no output schema, and no annotations, the description is severely incomplete. It doesn't explain the tool's general behavior, what it returns, or how it differs from siblings. The agent cannot correctly invoke this tool with confidence.

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%, so the baseline is 3. The description adds no parameter semantics beyond the schema, but the schema already documents each parameter adequately, so the tool meets the minimum bar without the description compensating.

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 names a specific verb and resource ('HTTP status for a public library docs URL'), but the input schema exposes 9 unrelated parameters (city, feed, json, zone, etc.), so the stated purpose is misleading about the tool's actual scope. It doesn't clarify that this is a generic check tool covering many input kinds.

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 on when to use this tool versus its many siblings (fetch-status, domain-shape, validate-json, etc.). The description provides no context for selection or exclusions.

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