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

With no annotations, the description carries the full burden and does well: it discloses the auth requirement (signed in as the invited email), the effect (grants operator access to your own account), and a key side effect (no new token is returned). It omits idempotency/error behavior and reversibility details.

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 core sentence is front-loaded and short, but the tail repeats itself: 'signed in as the invited email address' is restated as 'token of the invited email,' and the token's source is mentioned twice.

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 one-parameter mutation tool with no annotations and no output schema, the description covers the essentials: auth prerequisite, token source, resulting access, and the fact that no new token is returned. Minor gaps around error/failure behavior remain.

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 coverage is 0% for the single token parameter, so the description must compensate. It adds meaningful semantics: the token comes from the invite link and must belong to the invited email, which goes beyond the bare string type 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?

States a specific verb and resource (accept a delegation invitation) and clarifies the input source (token from the invite link), which distinguishes it from revoke_delegation and list_delegations. It does not explicitly name those siblings as alternatives, so it falls short of a 5.

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?

Gives a clear usage condition: you must be signed in as the invited email address, and the token must come from the invite link. It does not state when-not to use it or name alternative tools, so it stops short of explicit routing guidance.

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