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

With no annotations provided, the description carries the full burden. It discloses that a persistent identity with encrypted storage, audit log, and policy controls is created, but does not describe the return value, side effects, or lifecycle implications. The behavioral transparency is adequate but incomplete.

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 four sentences long and front-loaded with the primary purpose. It includes an example call, which is useful. No redundant information; each sentence adds value. Could be slightly more structured, but currently concise enough.

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 tool's complexity (4 parameters, no output schema, no annotations), the description covers the purpose and key features but lacks information on the return format (e.g., session ID) and how to use the created identity with sibling tools. It is minimally complete but has notable gaps.

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% with minimal parameter descriptions. The description adds value by listing platform values and giving an example call, which clarifies the expected format. However, it does not add significant meaning beyond what the schema already provides, warranting a baseline score of 3.

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 verb 'Create' and the resource 'persistent digital identity in the Zambo Presence vault'. It lists key features (encrypted session store, audit log, policy controls) and distinguishes from sibling session tools (attach, kill, list) by being the creation action.

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 specifies supported platforms and autonomy modes but does not provide explicit guidance on when to use this tool vs alternatives like agent_hire or other session tools. Usage is implied as the first step for creating an identity, but no when-not or alternative explanations are given.

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