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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint, covering safety. The description adds a behavioral detail beyond schema: for syndicated items, the URL points to the original publisher, not CrowdSpace, which matters when citing sources. It also clarifies editorial vs syndicated semantics, though the schema already explains these values, so this is a solid 4 rather than a 5.

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?

Each sentence earns its place: content fields, filtering capability, when to use, citation guidance, and when not to use. The description is front-loaded with the core purpose and finishes with an actionable exclusion. No filler.

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?

With zero required parameters, 100% schema coverage, an output schema available, and rich annotations, the description only needed to fill gaps: use case, citation rule, and news-feed vs catalogue distinction. It does so completely, leaving nothing an agent must guess.

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%, so every parameter (to, from, kind, lang, page, category, per_page) already has documentation in the schema. The description restates category/kind/date-range filtering at a high level but adds no parameter-level meaning beyond the schema. Baseline 3 applies.

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 opens with a specific verb and resource: retrieving recent crowdfunding and P2P lending news, and enumerates the fields each item carries. It distinguishes itself from the catalogue by explicitly stating it is a news feed and that search_platforms holds current platform data, so an agent can tell tools apart without inspecting schemas.

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 an explicit positive trigger ('what happened recently / any news about X' questions) and an explicit negative boundary (do not use it to establish facts about a platform). It names the alternative tool, search_platforms, and explains why it is better suited for the excluded case.

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