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

Annotations already declare readOnly, idempotent and closed-world. The description adds beyond that: the geographic scope (Málaga province only) and the default result size of 60 places ordered by listing count, which are not derivable from the annotations.

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?

Two sentences, front-loaded with the resource and its contents, followed by the default-behavior caveat. No filler.

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?

An output schema exists and annotations cover the safety profile, so the description only needed scope and default behavior, both of which are present. Minor gap: no indication of whether the 60-place cap can be altered or paged.

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 documented ('Only areas inside this municipality', 'Part of a place name, any spelling'). The description only notes that filters exist generically, adding nothing param-specific, so the baseline 3 applies.

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 the resource precisely (municipalities and areas of Málaga province with EVS listings) and what each entry contains (counts of sale, rent and new-build homes). It is clearly distinct from search_properties and get_property, though no explicit verb leads the sentence.

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 default behavior is disclosed ('Without a filter returns the 60 places with most listings'), which implies how to use the unfiltered form. However, there is no explicit guidance on when to use this rather than search_properties, and no note that the 60-result cap cannot be changed.

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