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

Annotations already establish readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds useful behavioral context about what coverage data includes (countries, sources, open/upcoming/awarded counts, last read timestamps) and how that data should be interpreted for freshness claims.

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?

The purpose, usage condition, exclusion, and example are front-loaded with no wasted prose. Each sentence contributes to correct tool selection or invocation.

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?

The tool has an output schema, so return-value details need not be repeated in the description. With read-only annotations, full parameter schema coverage, and clear sibling routing, the description gives everything an agent needs to select and call this tool correctly.

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%, and the country parameter is already documented thoroughly, including the full source list and omission behavior. The description adds only a concrete example, which is helpful but largely redundant with the schema.

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?

The description states a specific verb and resource: showing where Winquill looks, including countries, sources, notice counts, and last-read times. It explicitly distinguishes this coverage-inspection tool from searching by naming search_tenders as the alternative.

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?

It gives explicit when-to-use guidance: before saying a tender is not published anywhere Winquill reads, or when reporting freshness. It also gives an explicit when-not-to-use: 'Not for searching (use search_tenders).'

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