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

Annotations declare a non-read-only, non-idempotent, non-destructive mutation, but the description adds no behavioral detail. It does not say what state changes occur, whether resuming twice is safe, what errors may arise, or what the tool returns.

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 short sentence with no filler, and the action is front-loaded. Its terseness is efficient but contributes to the under-specification noted in other dimensions.

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 mutating mailbox-state tool with no output schema and only generic annotations, the description is too thin. It omits state-transition semantics, prerequisites, and expected outcomes that an agent needs to invoke this correctly.

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 is only one parameter, and schema description coverage is 100%, so the schema already documents the mailbox email and provides an example. The description adds no additional meaning about the parameter beyond what is in the schema.

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 ('Resume') and resource ('warm-up for a mailbox'), making the operation distinguishable from pause_mailbox. However, it does not explain what 'warm-up' means or how this differs from other mailbox state tools beyond the verb.

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?

There is no guidance on when to use this tool versus pause_mailbox, warmup_stats, or update_mailbox. It also does not state prerequisites, such as whether warm-up must already be configured or paused.

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