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

readOnlyHint=true is consistent with 'Legge', so no contradiction. The description adds one behavioral fact beyond annotations — that the returned document comes with its citations — which is useful since no output schema exists, but it says nothing about failure modes (missing id, access restrictions) or size/format of the returned document.

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?

One short sentence with the verb and scope front-loaded; nothing redundant. It is arguably under-sized for a tool with zero parameter documentation, but as written every word earns its place.

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 one-parameter read tool with no output schema, the description covers the bare essentials and adds the citations return detail, but leaves the id-provenance and error behavior unexplained, which the schema does not compensate for at 0% coverage.

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 0% for the single parameter: the schema only gives the name, type and maxLength 40, with no description. The description says a document from the archive is read but never explains the id's format, whether it comes from cerca_archivio, or what happens on an invalid id.

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?

Stated verb+resource: 'Legge un documento dell'archivio' (reads a document from the archive), plus the scope qualifier 'con le sue citazioni' (with its citations). This distinguishes it from siblings like cita and cerca_archivio, though it never names the search tool as the entry point for obtaining a document.

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 statement of when to use this versus cerca_archivio for finding documents, nor how a documento_id is obtained. Usage is only inferable from the name and the word 'documento_id' in the schema.

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