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

Annotations already declare readOnlyHint=true and destructiveHint=false, and the description reinforces this by explicitly stating the copy URL 'starts browser navigation... it is not an MCP or REST write.' This preempts a likely misreading of the copy URL as a write-capable endpoint.

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 longer than average but each sentence earns its place: purpose, usage context, return values, the critical browser-copy caveat, and the follow-up workflow. It is front-loaded with the main action and well organized, though slightly dense.

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 an output schema present, return-value details are already structured, and the description still adds the essential browser-navigation caveat and the post-copy discovery flow. The tool is fully specified for an agent to select and invoke it correctly.

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 100%, so all three parameters are already documented. The description adds high-level purpose ('search by keyword') but does not add substantive parameter-level meaning beyond the schema baseline.

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?

States a specific verb and resource: 'Search the public Charming Template directory by keyword.' It further differentiates from siblings by explicitly positioning it as the pre-create_app check and as the answer to 'what Templates exist,' which separates it from list_apps and create_app.

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?

Gives explicit when-to-use guidance: before calling create_app, or when the user asks what Templates exist. It also explains the post-copy workflow with list_apps and get_app_source, effectively telling the agent which sibling tools to use after the browser flow.

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