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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered; the description adds genuinely new context: data provenance, a nightly refresh cadence, and the default open-calls filter. It stops short of describing result shape or pagination behavior, but the additions are real value beyond 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?

Three short sentences, zero padding, with the resource and scope front-loaded before the freshness and default-filter details. Every sentence adds a distinct fact.

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 13-parameter tool with no output schema, the description never sketches what a result contains (deadline, amount, region, link) or how limit/offset pagination behaves, so the agent cannot anticipate the return payload. Source, freshness and default scope are covered, making it minimally adequate rather than complete.

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 100% with 7 well-documented enums, so the schema carries the parameter burden and baseline 3 applies. The description contributes two useful hints — Italian-language input for q and the open-only default that explains include_closed — but nothing about sort, min_amount semantics, or pagination interplay.

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 concrete verb and resource ('Search Italian public grants, incentives and calls') and names the underlying sources (incentivi.gov.it, regional, chamber-of-commerce). It is clearly a bulk search rather than a single-record fetch, so it separates from get_incentive, but it never names a sibling tool explicitly to route the agent.

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?

'Open calls only by default' implies the primary usage context, but there is no explicit when-to-use guidance against alternatives such as closing_soon (deadline-driven lookups) or match_business (profile-based matching). The agent must infer which tool to pick from sibling names alone.

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