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

Annotations only state that the operation is neither read-only nor destructive, which provides little behavioral insight. The description says 'exchange' but does not disclose whether the original credential is invalidated, whether this is a one-time operation, what authentication context is required, or what capabilities the resulting token carries. For a security-sensitive identity tool, this is a significant gap.

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 a single sentence with no redundant phrasing and the core action is front-loaded. The jargon density somewhat hurts immediate comprehension, but the conciseness itself is strong for the purpose it does serve.

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?

With 7 undocumented parameters, no output schema, and no lifecycle or usage context, the description is far from complete. An agent would know the intended transformation but would have to guess at parameter formats, optionality, and the meaning of the returned token. This is inadequate for a non-trivial identity exchange operation.

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?

There is 0% schema description coverage and 7 parameters, so the description needed to compensate. It vaguely implies that provider, signature, and timestamp are part of the 'verified provider assertion', but it leaves nonce, subject, capabilities, and display_name unexplained. An agent cannot reliably map all parameters to real-world values from this description.

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 names a specific action ('exchange') and a concrete outcome ('universal principal token'), and it identifies the two acceptable input forms: a verified provider assertion or an existing AgentLot bearer credential. This is more than a tautology, though the heavy jargon and lack of explicit contrast with identity-related siblings like register_agent or connect_public_wallet keep it from being fully self-explanatory.

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 gives no when-to-use guidance and no exclusions or alternatives. Given the very large sibling list with several identity-adjacent tools (register_agent, connect_public_wallet, get_me), an agent cannot easily determine whether this is the right tool for a given identity-related task without further inference.

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