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

With no annotations, the description carries full burden for behavioral disclosure. It states the tool provides market intelligence data, implying read-only behavior, but does not explicitly confirm non-destructiveness, auth requirements, or rate limits. The description adds value by listing return data types but lacks comprehensive behavioral context.

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 a single, efficient sentence using a colon to introduce the data list. It is front-loaded with the action and resource, with no wasted words.

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?

The description lists returned data types but does not clarify default behavior when no parameters are provided, whether results are aggregated for all islands, or the output structure. With no output schema, more detail on return format would improve completeness.

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 coverage is 100% with both parameters having descriptions ('Island name' and 'Country code: KY or LC'). The tool's description adds 'Caribbean' context but does not significantly augment parameter meaning beyond the schema. Baseline 3 is appropriate.

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 the verb 'Get' and specifies the resource as 'market intelligence for Caribbean rental markets,' listing specific data points (average rates, occupancy estimates, property counts, seasonal patterns). It distinguishes itself from sibling tools like rental_search and rental_availability.

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 usage for retrieving Caribbean rental market data but does not provide explicit guidance on when to use this tool versus alternatives like rental_stats or rental_price_history. No when-not-to-use or alternative suggestions are given.

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