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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds useful semantic detail about what is returned ('completed', 'actual', 'open funded jobs') but does not disclose any behavioral caveats such as data freshness, aggregation logic, or access requirements.

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 description is a single concise sentence with no filler. It states the main outputs immediately and does not repeat obvious information beyond what the title already conveys, which is acceptable.

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 parameterless, read-only metrics tool, the description gives enough information about what the agent will receive: completed GMV, actual platform fees, and open funded jobs. There is no output schema, so explaining these return components is valuable and mostly sufficient, though some format or period detail could still be added.

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?

The tool has zero parameters, so the baseline is 4. The description provides no parameter-level detail, which is appropriate since there is nothing to configure. The focus is on the output, which the description partially conveys.

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 uses a clear verb ('Return') and names a specific resource: completed GMV, actual platform fees, and open funded jobs. It is clear and informative, though it does not explicitly distinguish itself from siblings like get_market_stats or get_revenue_dashboard.

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 guidance is given about when to use this tool versus the many sibling tools that also deal with market, money, or earnings metrics. The description only states what it returns, not the context or conditions that should lead an agent to select it.

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