http_headers

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

With no annotations, the description carries the full burden of disclosing side effects and requirements. It does mention a cost of $0.001 USDC via x402, which is useful, but it does not describe what the tool actually does, what data it returns, whether it makes external network requests, or any rate limits. This is insufficient for an unannotated tool.

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 short and free of verbose filler, but it is under-specified rather than appropriately concise. It includes the tool name, a vague category, and cost, but omits essential action and parameter details. Structure is a single sentence, which is easy to parse, but the content is not well-rounded.

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 network tool with no output schema and no annotations, the description is too sparse to be actionable. It does not explain the request/response format, the meaning of the output, or any edge cases. The cost and category alone are insufficient for an agent to select and invoke this 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?

The schema only provides a generic 'params' object with a placeholder description ('Tool parameters as JSON object'), and the tool description adds no specific parameter information. Although schema coverage is reported as 100%, the coverage is superficial because no actual parameter names, types, or examples are given. The description does not help an agent understand what keys to provide.

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 simply restates the tool name ('http headers') and adds a broad category ('Security & Network tool') without a specific verb or action. It does not clarify whether the tool fetches, inspects, or modifies HTTP headers, and it fails to distinguish this tool from sibling tools like dns_lookup or check_http_status.

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. The phrase 'Security & Network tool' vaguely implies a network security context, but there is no explicit context, prerequisites, or mention of when not to use it. Sibling tools like read_url and web_scrape may overlap, but the description offers no differentiation.

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