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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint, so the description adds the material behavioral fact that no agent call is made, which is more specific than a generic read-only hint. It does not disclose return format or error behavior, but the annotations lower the burden.

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?

A single sentence with no filler and the key constraint ('without calling the agent') placed at the end after the core purpose. The title reinforces the resource without redundancy.

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?

The description is sufficient for basic invocation with the required agent_card parameter, but it leaves source_url unexplained and 'assess' ambiguous regarding output or evaluation criteria. The sibling names hint at overlap, yet the description does not disambiguate them.

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 0%, so the description must compensate for the bare parameter types. It maps 'Agent Card metadata' to agent_card but does not explain the nested object's expected shape or the meaning/optionality of source_url.

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 uses a clear verb ('Assess') and a specific resource ('supplied public Agent Card metadata'), and it adds the scope constraint 'without calling the agent,' which distinguishes it from agent-invoking tools. However, 'assess' is somewhat underspecified, and no sibling tool is named as the alternative.

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?

There is no when-to-use or when-not-to-use guidance. The phrase 'without calling the agent' states a behavioral constraint rather than a selection rule, and the description does not point to compare_agent_candidates or any gaip_* sibling as an alternative.

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