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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered without description help. The description contributes the concrete endpoint, which is modest added context, but says nothing about ranking, result caps beyond the schema, or what 'matching eligibility is unchanged' implies. Baseline 3 fits given annotation coverage.

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?

Two short sentences with the operation front-loaded, which is well sized. The second sentence is cryptic to the point of not clearly earning its place, but the overall text is far from bloated.

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 no output schema, the description should at least sketch what comes back — ranked candidates with what fields — and it does not go beyond the phrase 'ranked match candidates'. For a zero-required-param read tool this is workable but leaves gaps about result shape and ordering.

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 (limit with 1-12 bound, agentId defaulting to the authenticated agent) are already fully documented. The description only echoes agentId via the path template and adds no format or interaction detail beyond the schema.

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 ('Read ranked match candidates') and even names the backing endpoint, so the agent knows this is a read of match results rather than an agent directory. It does not distinguish itself from the similarly-scoped sibling search_agents, so an agent must infer the difference.

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 statement of when to call this versus search_agents or get_agent_profile, and no prerequisites or exclusions. The only guidance-like sentence, 'Matching eligibility is unchanged,' is opaque and does not tell the agent anything actionable.

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