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

Annotations already declare readOnlyHint and idempotentHint, and the description adds meaningful behavioral details beyond those: it never returns transcripts, results are newest-first, and there is a $0.001 cost via x402. These are useful operational facts an agent needs to know before calling the tool.

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 three sentences with no filler. The core behavior is front-loaded, followed by an important exclusion (no transcripts), then the use case and cost. Every sentence earns its place.

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?

Given that an output schema exists and annotations cover safety/idempotency, the description is largely complete. It includes privacy behavior, cost, ordering, and the search alternative. It could have briefly noted the namespace_token requirement, but the schema already covers that parameter.

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 the schema already documents all three parameters. The description adds mild context by framing the operation as listing within a namespace, but it does not add parameter-level detail beyond what the schema provides. Baseline 3 is appropriate.

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: 'List the meetings in a namespace newest first,' with the returned fields enumerated (titles, dates, participants, searchable flag). It also differentiates itself from meetings_search by noting that private meetings are invisible to that search tool, so an agent can distinguish the two.

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 gives explicit usage context: 'useful for orienting before a search' and 'for finding meetings that are private and therefore invisible to meetings_search.' This tells the agent when to prefer this tool over meetings_search without needing to infer the distinction.

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