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

With no annotations, the description must disclose behavior itself. It says 'No disk access' but does not explain whether the tool performs network calls, reads environment variables, has side effects, or what it returns on success/failure.

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 itself is very short and front-loaded with the key verb and subject. However, the surrounding schema is large and repetitive, and the description could have been slightly more informative while staying concise.

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?

There is no output schema and no annotations, so the description must carry full context. It fails to explain what 'safe' means, what return value is expected, how to handle invalid inputs, or why 9 optional parameters are relevant. An agent cannot reliably invoke or interpret this tool.

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?

Although the schema covers 100% of parameters, the descriptions are generic and often irrelevant to a file-path check (e.g., 'City name for a public weather hint'). The tool description adds no clarification about which parameter is the path or how the others are used.

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 clear verb and resource: 'Check whether a path looks safe', but the parameter list includes many unrelated optional fields (url, city, json, etc.), which muddies which 'path' is being referenced and what the tool actually operates on.

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 about when to use this tool versus the many similarly named siblings (e.g., normalize-url, browser-url-ok, domain-shape). The description only states 'No disk access', which is a constraint, not a usage condition.

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