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

With no annotations, the description carries the full behavioral burden. It usefully discloses that the tool contacts the URL via MCP, grades specific checks, is SSRF-guarded, and is free. However, it does not explicitly state read-only behavior, side effects, auth requirements, or rate limits, leaving meaningful gaps.

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, front-loaded, and every sentence carries useful information. The parenthetical criteria list efficiently explains what is graded without bloating the definition.

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 self-check tool with no output schema, the description provides enough context to select and invoke it: it explains the endpoint target, optional A2A card, grading criteria, and SSRF protection. It does not describe the returned report format, but the overall definition is still substantially complete.

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 both parameters are already documented in the input schema. The description reinforces that the tool speaks MCP to the supplied URL and that the A2A card is optional, but adds no syntax or format detail beyond the schema. Baseline 3 is appropriate.

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?

States a specific verb and resource: it speaks MCP to a URL and grades the endpoint against THE AGENT STANDARD. The grading criteria are listed, making the purpose concrete. It does not explicitly differentiate itself from nearby siblings such as check_agent_health or get_agent_standard, so it falls short of a 5.

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?

Gives a clear usage context: it is a free self-check to run before claiming a record. That tells the agent when this tool is appropriate. It does not name alternatives or exclusions, so it does not reach 5.

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