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

Annotations indicate non-read-only and non-idempotent behavior; the description adds concrete side effects (joins user to company, returns a one-time key). It does not describe failure modes or code reuse consequences but adds meaningful context beyond the annotations.

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?

One dense, front-loaded sentence with no filler. Every phrase delivers needed context: step position, verification, side effect, and output.

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 an output schema present and a fully documented 3-parameter schema, the description adequately covers the workflow step and side effects. It could mention what happens on invalid or already-used codes, but the current information is sufficient for typical invocation.

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?

Input schema has 100% coverage with descriptions for token, code, and optional name. The description adds little parameter-level detail beyond 'emailed code,' so the schema carries the burden.

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?

Description states specific actions: verifies the emailed code, joins the invited user to the company, and returns a one-time MCP API key. It clearly identifies the resource and process and distinguishes itself from the sibling accept_team_invite_request by labeling it 'Step 2.'

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?

Frames tool as 'Step 2 of agentic team invite acceptance' and the schema notes the token comes from create_team_member_invite, implying a sequential workflow. It does not explicitly name alternatives or exclusions, but the step context is clear enough.

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