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

No annotations are provided, so the description carries full behavioral burden. It discloses that it reads a public listing (name, subtitle, rating, reviews count, languages, screenshots) and that it is free, which is useful. However, it does not describe what happens on success (e.g., app appears in workspace), error behavior for invalid URLs, or side effects beyond that it is free.

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?

Two efficient sentences, front-loaded with the action and input, followed by the read behavior and cost. No wasted words.

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 add tool with no annotations or output schema, the description covers input source, what is read, and cost. It does not specify error handling, workspace requirements, or return behavior, but the core invocation context is complete.

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 coverage is 100% and the single parameter is documented there as the apps.apple.com link. The description restates the link format and adds an example (id123), but the schema already provides the required format. Baseline 3 per rules when schema is fully covered.

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 (Add) and resource (founder's iOS app), plus the exact input form (apps.apple.com link). It reads a public listing, which distinguishes it from sibling tools like app_audit or app_reviews that operate on already-added apps.

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 implies usage ('from its App Store link') but does not state when to use this versus alternatives such as app_audit or app_reviews, nor does it mention prerequisites like having a workspace. Usage context is implied through the input requirement, not explicitly guided.

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