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

With no annotations, the description carries the full burden. It adds useful behavioral context by noting alerts are 'updated daily' and include 'official corrections and withdrawals,' indicating data freshness and content scope. It does not mention side effects, but since this is a read-only list tool, this is acceptable.

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 concise (two sentences) and front-loaded with the core purpose. The second sentence adds valuable update-frequency and content nuance without redundancy or fluff.

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 simple read-only list tool with 4 optional parameters and no output schema, the description adequately covers purpose, filters, and update behavior. It does not describe the return format, but given the tool's simplicity and that output schema is absent, this is a minor gap.

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 baseline is 3. The description's mention of filters (country, category, risk level) simply echoes the schema parameter descriptions without adding additional syntax, constraints, or examples beyond what the schema already provides.

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 clearly states the tool lists 'the most recent EU Safety Gate product recall alerts', using a specific verb and resource. It also mentions optional filters, distinguishing it from sibling tools like check_product_recall and get_brand_recall_history by focusing on recent alerts rather than individual lookups or brand history.

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 description implies when to use the tool (to get recent alerts) and lists available filters, providing clear context. However, it does not explicitly contrast with alternative tools or state when not to use it, so it falls short of the explicit guidance required for a 5.

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