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

Beyond the readOnly/idempotent annotations, the description discloses two non-obvious traits: browsing has no side effect on the active tool catalog or tools/list, and cursors are scoped to the catalog and permission set (so they can't be reused across changed permissions). That is genuine behavioral context an agent could not infer from 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 short sentences, front-loaded with purpose, then the traversal rule, then the side-effect and cursor caveats. No filler or repetition of the title.

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 read-only, output-schema-backed browse tool this covers purpose, entry point, side effects, and pagination scoping. It could say slightly more about what a toolset node contains, but that is arguably delegated to the output schema.

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 0%, so the description must carry the load: it explains that parent_id is an exact ID and that omitting it returns roots, and it explains what cursor is bound to. Only `limit` is left to the schema's min/max bounds, which is adequate.

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 and resource — browsing the 'permitted Genflick tool library' — and scopes it to a parent ID, which separates it from the singular get_toolset sibling. It stops short of naming get_toolset or native.activate_toolset explicitly, but the read/list nature is unmistakable.

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?

'Omit parent_id for roots' gives a concrete entry-point rule, and 'Discovery does not activate tools or change tools/list' implies this is a pre-step to activation. However, it never names the alternative (get_toolset, native.activate_toolset) or states when an agent should skip listing and go straight to a known toolset.

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