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

No annotations are provided, so the description carries the full burden. 'Value discarded' gives no clue about side effects, permissions, return value, or whether the tool performs any action beyond validation. The description is opaque about all behavioral aspects.

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 short sentence, which is concise, but it is under-specified to the point of being useless. Conciseness should not sacrifice essential information; here the brevity hides the tool's entire purpose.

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?

With 10 parameters, no output schema, no annotations, and a large sibling set, the description provides almost no context. An agent cannot determine what input to provide, what the tool will return, or when to invoke it. This is grossly incomplete.

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 100% coverage, but the parameter descriptions are individually strange (e.g., 'discarded after the shape check' implies validation but never explains what the tool does with the results). The tool description adds no unifying meaning; it fails to explain why these 10 unrelated parameters exist together or what 'coep-ok' actually checks.

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 mentions a COEP token but does not state what the tool does with it. The 10-parameter schema with unrelated fields (city, feed, json, host) contradicts the COEP-only hint, making the actual purpose unclear and likely misleading. No verb or resource is specified.

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 any of the 30 siblings. There is no mention of alternatives, exclusions, or context where this tool is appropriate.

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