compare_apps

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

The description adds a behavioral note that untracked URLs are scraped fresh and not persisted, which is useful. But with no annotations, it does not disclose whether the tool is read-only, if any caching occurs, or what the response looks like, leaving significant gaps for a non-annotated tool.

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 two sentences, front-loaded with the main action and object. The second sentence efficiently explains the dual input types with no redundancy or filler, making it appropriately sized and well-structured.

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 no output schema and no annotations, the description supplies core input semantics and a side-effect note, but omits what the comparison output includes, error scenarios, or performance caveats. It is adequate for basic invocation but not fully complete given the lack of structured context.

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 description essentially restates the input schema's property descriptions (id vs url) without adding new meaning. Since schema coverage is 50% but the existing descriptions are already clear, the description neither enriches nor harms parameter understanding.

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 clearly states the tool compares the privacy posture of two apps side by side, using a specific action ('Compare') and resource ('privacy posture'). It distinguishes itself from siblings like get_app or list_apps, which do not perform comparisons.

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?

It explicitly describes the two acceptable input types (tracked id vs untracked URL) and their differing behavior, giving clear context for use. However, it does not name alternative tools or state when not to use this tool, so it stops short of a 5.

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