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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description adds valuable behavioral context: free, no auth, no arguments, and the return format (Markdown up to 12,000 characters with title, date, URL). This goes beyond the annotations and fully discloses what the agent should expect.

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 sentences with zero waste. The usage condition is front-loaded, followed by the return details. Every word adds value, and the structure is clear and scannable.

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 zero-parameter, simple read tool, the description fully covers what the tool does, what it returns, the format, size limit, contents, and authentication requirement. There is no output schema, so the description carries the full burden and meets it completely.

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?

There are zero parameters, and the description explicitly states 'No arguments.' The schema is empty, so there is nothing more to explain. This meets the baseline for 0 parameters.

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 a specific verb (get) and resource (latest weekly metadox), and explains what a metadox is (the week's central contradiction, counter-evidence, dated forecasts) plus output format (Markdown, up to 12,000 chars, with title, date, URL). It also distinguishes itself from 'a list', which differentiates it from list-oriented siblings.

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 opening line gives an explicit condition: 'Use when you want one synthesis of the week in AI engineering instead of a list.' This tells the agent when to use it and implicitly when not to (when you want a list), but it does not name specific sibling tools. That is clear context but lacks explicit alternatives.

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