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

Annotations already indicate a safe read-only operation (readOnlyHint true, destructiveHint false), so the bar for additional disclosure is lower. The description adds the user-scoped, 'registered' nature of the result set, but it does not mention pagination, defaults, or how the optional filters affect behavior.

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 efficient sentence with no wasted words and is front-loaded with the action. However, it is under-specified given the four undocumented optional parameters, so conciseness comes at the cost of usefulness.

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?

The output schema and annotations cover some context, and no parameters are required, so a basic call is possible. But the complete absence of parameter semantics, filtering guidance, and sibling differentiation leaves the definition inadequate for confident invocation with non-default options.

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 description coverage is 0%, and the description provides no meaning for any of the four parameters (flow, limit, lifecycle, source_format). Since the schema itself only gives types and defaults, the agent has no semantic basis for choosing parameter values.

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 uses a specific verb ('List') and resource ('skills') and adds the scope 'registered for this user', making the tool's purpose clear. It is distinguishable from the sibling actionlayer_list_actions by naming 'skills' rather than 'actions', though it does not explicitly contrast itself with that sibling.

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?

There is no guidance on when to use this tool versus alternatives such as actionlayer_list_actions or when filters like flow, lifecycle, or source_format should be supplied. The phrase 'registered for this user' gives some context but no exclusions or selection criteria.

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