update_rental

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

With no annotations, the description carries the burden. It does disclose that it's an update operation, that rental_data is 'fields to update' (suggesting partial update), and that it returns updated details. However, it lacks information on permissions, error conditions, or side effects, which is a moderate gap for a mutation tool.

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 concise and well-structured with Args and Returns sections. It avoids unnecessary fluff, though the parameter explanations are minimal and could be enriched without adding length.

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?

Given no annotations, low schema coverage, and a nested object parameter, the description is incomplete. It explains the basic operation and return type, but misses usage context, parameter format specifics, and any behavioral caveats. The output schema helps with return values, but the input side remains under-explained.

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 compensate. It explains property_id as 'the property ID' and rental_data as 'a dictionary with fields to update,' adding basic meaning beyond the bare schema. However, it does not enumerate valid fields, leaving the flexible additionalProperties object under-specified.

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 clearly states 'Update an existing rental property' with a specific verb and resource. The term 'existing' distinguishes it from create_rental, and the resource is unambiguous despite many sibling update_* 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?

No guidance is given on when to use this tool versus alternatives like create_rental or get_rental. The description only implies it's for modifying an existing property, but no explicit exclusions or alternative references are provided.

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