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

With no annotations, the description carries the full burden. The word 'Read' makes the read-only nature apparent and the URI format is useful, but it does not describe the return value, failure behavior, or any edge cases. This is adequate but not rich.

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 short and front-loaded: the purpose appears first, followed by the only relevant argument detail. The Args block is not redundant because it adds the URI format example beyond the bare schema.

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 single-parameter read operation, the description provides the URI syntax and tells the agent how to discover valid URIs, so invocation is straightforward. A brief note about the return content would make it fully complete, but the current description leaves few 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?

The schema's uri property has no description, so the description must compensate. It does by providing a concrete URI pattern and an authoritative source for valid values. This covers the parameter's meaning well despite 0% schema coverage.

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 first sentence states the verb and resource clearly: 'Read a product skill file by its skill:// URI.' It identifies the exact resource type and URI scheme. It does not explicitly contrast itself with skills_list_tool, but pointing to it for valid URIs makes the relationship understandable.

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 instruction 'Get valid URIs from skills_list_tool' tells the agent the prerequisite step and names the relevant sibling tool for discovery. It does not spell out when not to use read_skill, but it gives enough context to infer the intended workflow.

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