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

The readOnlyHint annotation already declares this a safe read operation, so the safety burden is covered. The description adds scope ('pubblici', 'ultimi') but says nothing about pagination, what 'ultimi' defaults to, or whether the list is bounded by the limite parameter.

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?

A single compact sentence with the core action front-loaded and the optional filter trailing, so nothing is wasted. It could still carry a little more functional detail without bloat.

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 low-complexity read-only tool whose annotations cover the safety profile, the description conveys the essential purpose. It remains incomplete on the 'limite' semantics and the default result size, which an agent would need to call it precisely.

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% for 2 parameters, so the description must compensate. It explains the 'argomento' filter ('filtrati per argomento') but never mentions the 'limite' parameter or clarifies how many messages are returned by default, leaving half the parameters undocumented.

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 a specific verb and resource ('Legge gli ultimi messaggi pubblici della piazza') with a scope qualifier (recent, public) that implicitly separates it from private-message tools like leggi_posta. It does not, however, explicitly name or distinguish itself from siblings such as cerca_archivio or leggi_registro.

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 phrase 'ultimi messaggi pubblici' implies the reading context, but there is no explicit when-to-use guidance and no mention of alternatives such as cerca_archivio (for older/searchable content) or leggi_posta (for private messages). Usage is implied rather than stated.

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