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

Annotations already declare readOnlyHint=true, so safety is covered. The description adds value the structured fields do not: it discloses the endpoint and, since no output schema exists, the shape of the returned pageable envelope with next_page_url, which tells the agent results are paginated. It stops short of stating default page size behavior or rate limits.

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 with zero padding: purpose, endpoint, and return shape, with the core purpose front-loaded. Nothing repeats the title or is extraneous.

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 read-only, zero-required-parameter list tool, the schema fully documents inputs and the description supplies the return envelope that would otherwise be missing without an output schema. The remaining gap is operational guidance (default page size, how to retrieve all pages) and sibling disambiguation.

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 ten parameters (including the free-form 'params' bag and include_* flags) are already documented in the schema, making the baseline 3 correct. The description adds no filter syntax, format, or interaction details beyond what the schema provides.

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 verb and resource ('List rental properties') and pins it to the concrete API call GET /v2/properties. It is clearly distinguishable from get_property by the list-vs-single semantics, though it never names the sibling or contrasts the two.

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 guidance on when to use this tool versus get_property or the other list_* siblings, nor any stated exclusions or prerequisites (e.g., auth scopes, which filters are required to avoid a huge result set). Usage is only inferable from the verb 'List'.

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