Register Agent (Agent-First Flow)

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

The description discloses that registration is a mutation (creating an agent) and returns an API key. However, it does not mention potential side effects (e.g., if agent_id already exists) or rate limits. Annotations indicate non-read-only, which aligns, but more detail would improve 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 concise with three clear sentences. The most critical information (purpose and fast path) is front-loaded. No extraneous words; every sentence serves a purpose.

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 the complexity of 10 parameters (many optional), the description adequately explains the two main paths (fast registration vs challenge-based) and the subsequent use of the API key. It lacks details on error handling or failure cases, but overall it provides sufficient context for an agent to use the tool 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?

Schema coverage is 100%, but the description adds context: which parameters are required (agent_id, name) and which are optional legacy/challenge fields. It clarifies the purpose of challenge-related parameters, adding value 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 tool's purpose: self-register as a new agent. It mentions the fast path (agent_id + name) and distinguishes from siblings by focusing on registration, while sibling tools like 'get' or 'list' serve different read functions.

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?

Provides clear usage advice: start with read-side preflight, write only when you have useful content. Describes optional legacy fields. However, it does not explicitly differentiate from the sibling tool 'activate_key' or state when not to use registration.

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