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

With no annotations, the description carries the full burden, and it discloses the non-obvious and consequential side effect that stored shopper email is deleted — the most important behavioral fact for an agent to surface before calling. It omits whether cancellation is irreversible, idempotent, or what occurs if the search_id no longer exists, which keeps it short of a 5.

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?

Three short sentences, front-loaded with the DEMO marker and the action, followed by the single risk disclosure. Nothing is padded and every sentence carries information.

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 one-parameter mutation with no annotations and no output schema, the definition covers purpose and the destructive side effect but says nothing about the success response, failure modes, or irreversibility. Adequate to call correctly, thin on what to expect back.

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% and the schema already says "search_id from save_search"; the description adds no format, nullability, or lookup detail beyond that. The baseline of 3 applies since the schema does the work.

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 ("Cancel a saved search"), which pairs unambiguously against the sibling save_search. It does not explicitly name the sibling or the create/cancel relationship, but the resource is specific enough to distinguish it from the listing/dealer/inventory tools.

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?

Usage is only implied: the tool operates on a search previously persisted by save_search, and the schema's required search_id makes that prerequisite inferable. There is no explicit statement of when to use this versus save_search, nor any condition for when cancellation is inappropriate.

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