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

Annotations already declare readOnlyHint=true, openWorldHint=true, and destructiveHint=false, so safety is covered. The description adds the useful scope detail that these are listings removed from the MLS feed, but says nothing about pagination, default time windows, or response behavior beyond the endpoint path.

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 two short sentences with the core resource meaning front-loaded. The trailing 'GET /clients/soldpending' is somewhat technical but still compact and potentially useful for API mapping.

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?

Parameter details are fully covered by the schema, but with no output schema and a relatively rich seven-parameter tool, the description gives no sense of default behavior, time-window semantics, or what a response contains. It is minimally adequate rather than 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 all seven parameters are fully documented in the schema itself. The description adds no parameter meaning beyond the endpoint path, which is appropriate but leaves it at the baseline for schema-covered parameters.

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 states a specific resource ('The account's sold and pending listings') and clarifies it as listings 'removed from the MLS feed,' which distinguishes it from active-listing siblings. It does not explicitly name the closest sibling, idx_list_off_market_listings, but the purpose is immediately clear.

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 implied by the definition of sold/pending as removed from the MLS feed, but there is no explicit guidance on when to use this versus idx_list_off_market_listings or other listing-list tools. No exclusions or alternatives are mentioned.

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