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

Annotations already flag this as a destructive, non-read-only mutation, so the description should disclose what is actually affected. It does not say whether omitted flags are left untouched or reset, whether existing permissions are revoked, or that changes affect routing for the whole ad account — key risks for a destructive permission change.

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?

A single front-loaded clause with no filler, listing exactly the fields touched. Its brevity is efficient, though the terseness borders on a fragment that assumes the reader knows the domain.

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 destructive mutation with four undocumented parameters and a required ad_account_id, the description omits the most consequential facts: partial-update semantics and the blast radius of a permission change. The existing output schema covers return values, but that does not offset the missing behavioral and parameter 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?

Schema description coverage is 0%, so the description must carry parameter meaning. It names three of four flags but adds no semantics beyond the names — no explanation of what allow_create/allow_pull/allow_decision control, no mention of ad_account_id, and no partial-versus-full update behavior.

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 (update account permission routing flags) and names the three flags affected. The resource distinction from the sibling fb_users_update_permissions is implicit in the tool name but not reinforced in the text, so it stops short of full sibling differentiation.

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?

No guidance on when to use this versus alternatives (e.g., fb_users_update_permissions) and no prerequisites such as required permissions or account ownership. The agent must infer the entire usage context.

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