check_new_matches

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

No annotations are provided, so the description carries the full burden. It discloses that only unseen listings are returned, which suggests a stateful 'seen' mechanism. However, it omits what happens to the seen state (e.g., marking listings as seen by default), any side effects, or rate limits, leaving significant behavioral 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?

A single, efficient sentence that front-loads the core action and outcome. It earns its place but could benefit from slightly more detail given the lack of annotations and schema descriptions.

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?

An output schema exists, so return values needn't be explained. However, with no annotations and 0% schema coverage, the description should do more to cover parameter semantics and side effects. It is adequate but leaves clear gaps for correct invocation.

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 explain the parameters. It only mentions 'run a saved hunt' (implying 'name') and 'seen before' (implying 'mark_seen'), but does not clarify that 'mark_seen' defaults to true or what the parameter does. Most parameter meaning is left to inference from titles.

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 ('Run a saved hunt'), and clarifies the output scope ('return only listings not seen before'). It's distinguishable from siblings like run_hunt, but the description doesn't explicitly say how it differs from that tool, leaving a small ambiguity.

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?

The description implies the tool is used to check for new matches from a saved hunt, but it doesn't specify when to use this versus run_hunt or check_saved_search. No explicit when-not or alternative tool guidance is provided.

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