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

The required Pro+ plan is an important licensing precondition disclosed beyond annotations. The phrase "from the Power Clarity cache" also adds behavioral context, indicating the data is sourced from a cache rather than live or direct sources. The readOnlyHint and destructiveHint annotations already cover safety, so the bar is lower and the description adds meaningful value.

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, efficiently structured sentence that front-loads the licensing requirement before stating the exact function. Every part is relevant and there is no filler or redundant repetition of the tool name.

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 zero-parameter list-all operation, the description provides enough guidance: the scope (Power Apps canvas apps), the source (Power Clarity cache), and the access requirement. No output schema exists, but the operation is simple enough that an agent can safely invoke it without further explanation.

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 input schema has zero parameters, so there is no parameter semantics to cover. The description does not need to document parameters, and the baseline of 4 applies since there is nothing to add beyond the schema.

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 and resource: "List all Power Apps canvas apps from the Power Clarity cache." This clearly identifies what the tool does and distinguishes it from related siblings like list_canvas_apps by naming the cache source.

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 usage context is implied: this tool is for retrieving all canvas apps from the Power Clarity cache, and it requires a Pro+ plan. However, it does not explicitly explain when to choose this tool over alternatives such as list_canvas_apps or get_canvas_app.

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