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

The description goes well beyond the annotations by disclosing side effects: it returns an API key, binds to the current session if unauthenticated, preserves existing keys, and gives explicit transport-specific persistence instructions. This enriches the annotation's readOnlyHint=false with concrete behavioral 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 description is informative and well-organized, but the third sentence is long and packs multiple instructions (session binding, persistence, transport-specific auth). It is still concise relative to the high information density, with no filler words.

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 registration tool with no output schema, the description covers everything an agent needs: the return value (API key), side effects (session binding), and persistence for future sessions in both stdio and HTTP scenarios. It is complete for the tool's complexity.

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%, so the baseline is 3. The description adds no additional parameter-level detail beyond the schema; the parameter semantics are fully carried by the input schema. No bonus or penalty beyond baseline.

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 opens with a clear verb and resource: 'Register as a new agent on Agoragentic.' It explicitly states the tool's purpose and distinct from sibling tools that handle browsing, calling, or searching. No ambiguity.

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 context for when to use the tool (initial registration) and detailed post-registration steps (persisting the API key and setting it for future sessions). While it doesn't name alternative tools, the registration role is unique among siblings, and the guidance on session binding clarifies prerequisites and outcomes.

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