Complete activation

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

No annotations are provided, so the description carries full responsibility for disclosing behavioral traits. It mentions 'Final transition' suggesting irreversibility, but it does not explicitly state side effects (e.g., whether it consumes the activation, affects balance, or is irreversible). It also does not describe what happens on success or failure, or any response format. The API key requirement is a minimal authentication note but not sufficient behavioral transparency.

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 very concise—two short phrases and a requirement note. It front-loads the primary action and includes the essential prerequisite (API key). Every word earns its place, with no waste or redundancy.

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 simple operation with one parameter and no output schema, the description is largely adequate. It states the purpose and the prerequisite. However, it does not disclose the outcome (what it returns or whether it is reversible), which an agent might need to know. Given the absence of annotations, more detail on side effects would improve completeness, but it is not severely lacking.

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?

The input schema covers the only parameter 'id' with a description ('Activation id (from request_number or list_activations)') at 100% coverage. The tool description adds no additional detail about the parameter, so it meets the baseline of 3 without enhancing understanding beyond 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 clearly states the action: 'Mark an activation complete' and adds context that it confirms the SMS was used. It distinguishes itself from siblings like cancel by calling it the 'Final transition,' which implies it is the conclusion of a successful activation. However, it could be more explicit about how it differs from cancel or other operations, so it misses a perfect score.

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 provides some context on when to use it ('confirms the SMS was used', 'Final transition') which implies it is used after a successful SMS delivery. It does not explicitly state when not to use it or suggest alternatives like cancel, but the context is enough to infer typical usage. The mention of requiring an API key is a prerequisite, not a usage guideline.

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