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

Annotations already declare destructiveHint=true, non-idempotent and open-world, so the safety profile is covered. The description adds real context beyond that: the call provisions three environments as a side effect, slug is auto-derived unless supplied, and the exact auth scopes required. It doesn't restate the irreversibility of the operation, which annotations carry.

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?

Three tight sentences, front-loaded with the action and its environment side effect, then slug behavior, then auth. Every sentence carries actionable information; the docs link is a cheap pointer rather than filler.

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 doesn't indicate what comes back (e.g. the created app id/slug), which an agent may need for follow-up calls like get_app. Everything else — auth, side effects, required name/org, slug derivation — is adequately covered for a 6-parameter creation tool.

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 83%, so the schema already documents org, name, slug, url, modules and platform; baseline is 3. The description restates the slug default (already in the schema) and mentions the name, but says nothing about url, modules or platform, so it adds little beyond structured fields.

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?

Specific verb + resource ("Create an application inside an organization") plus a notable scope detail: it also provisions production, staging and development environments. That side-effect scope clearly separates it from get_app and list_apps, which read a single app or enumerate 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?

Gives concrete prerequisites ("Requires a token with the write scope and the apps.write permission") and explains the name/slug choice, which tells the agent how to call it correctly. It stops short of explicit when-not guidance or naming siblings like get_app for the read path, so it is clear context without exclusions.

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