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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds the meaningful behavioral distinction that supplying app_id broadens the response to include the app's current install state and a diff of what an update would change, which an agent could not infer from annotations or schema.

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 short sentences, front-loaded with the core action before the optional-parameter modifier. The phrasing is dense and comma-heavy but every clause adds information; nothing is padding.

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, the description must convey return content, and it does so concretely: installable parameters, integrations, and the app-scoped comparison. A minor gap is that it never says what a bare call without app_id returns beyond the base template details, but for a two-parameter read tool this is close to 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%, so the baseline is 3, but the description goes further by explaining the semantic effect of app_id (returns existing app state plus prospective update changes) rather than just restating its type. template_id gets no additional narrative beyond the schema pointer, which keeps it from a 5.

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 states a specific verb and resource and, unusually, also enumerates what the returned template object contains (parameters to fill in, required integrations), which distinguishes it from a bare 'get'. It doesn't explicitly name the contrasting siblings search_templates or install_template, so it falls short of a 5.

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 conditional 'With app_id, also...' implies when to supply the optional parameter, which is useful routing. However, nothing states when to use this versus search_templates or install_template, and the pre-install inspection workflow is only implied.

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