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

Annotations indicate read-only, non-destructive. Description adds context: it only reports state without modification, specifies that permissions are granted in System Settings (not JIT dialogs), and provides URLs to open the exact panes. No contradiction with annotations.

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 sentences, each earning its place: purpose and permission list, usage guidance, additional context on permission granting. No wasted words, front-loaded with essential information.

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?

Given no output schema, description could detail the return format or structure. It states 'reports the TCC permission state' but not the shape. Slight gap, but still adequate for a tool with no parameters and clear intent.

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?

No parameters exist, so description carries no burden. Schema coverage is 100% automatically. Description adds no param info which is acceptable. Baseline score of 4 applies.

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 it reports TCC permission state (screen recording, accessibility, microphone) needed for capture/automation. It distinguishes itself from sibling tools like 'list_missing_permissions' by specifying exact permissions and usage context.

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?

Explicitly advises calling before capture/automation runs and surfacing grant hints to avoid mid-sequence failures. Provides details about permissions being set in System Settings (not JIT dialogs) and mentions URLs for direct access, but could be clearer about when not to use.

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