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

Annotations already declare this is a non-destructive write (readOnlyHint=false, destructiveHint=false, openWorldHint=false), so the safety profile is covered structurally. The description adds the plan gating constraint but says nothing about idempotency, duplicate handling, or side effects on the watchlist.

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 compact sentences with the action front-loaded, no filler. The trailing plan fragment is slightly abrupt but still informative rather than wasteful.

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 mutation tool with no output schema and 25% schema coverage, the definition covers the core action and eligibility but omits duplicate-handling behavior and return semantics. Adequate but with clear gaps.

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 only 25%, so the description must compensate, and it partially does by clarifying the 'kind' domain (buyer vs supplier/competitor). The name and country parameters receive no elaboration in either the description or schema, and tender_id is only explained by its schema description.

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 (add) and resource (public buyer or supplier) plus the outcome (follow their tenders and awards). It implicitly separates itself from save_tender and my_watchlist, but never names a sibling for contrast.

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 eligibility prerequisite 'Intelligence plan and above' is stated, which is genuinely useful, but there is no guidance on when to use this versus save_tender or my_watchlist, and no indication of what happens on repeat adds.

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