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

Annotations already declare destructiveHint=true and openWorldHint=true, so the safety profile is covered; the description adds genuine context by disclosing the approval gate, the digest-verified stored plan, the reject-other-operation-kinds behavior before anything is reserved or applied, and the spend impact. It does not specify what error or state results when a digest mismatch is rejected.

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 with the approval prerequisite front-loaded, followed by the binding constraint and the side-effect warning. The clause about changing external Meta state partially restates openWorldHint/destructiveHint, so it is not perfectly wasteful-free.

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?

Output schema exists, so return values need not be described, and the description covers approval gating, plan binding, rejection behavior, and spend risk. Minor gaps remain around failure semantics and the optional connection_context parameter.

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 patterns alone convey format but not role. The description supplies real meaning for both required parameters: approval_ref selects the stored plan and expected_plan_digest binds execution to that exact plan. connection_context remains unexplained anywhere.

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 ('queue') and resource ('approved grouped batch of Meta ad copies'), and the word 'grouped' implicitly distinguishes it from the singular siblings like operations_confirm_ad_copy. It is clear but never explicitly names the alternative, so sibling differentiation is left to inference.

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 a clear precondition for use ('after explicit user approval') and the binding rule that only the stored plan referenced by approval_ref is used, rejecting other operation kinds. It stops short of stating when to prefer this over the single-copy or other operations_confirm_* siblings.

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