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

Annotations already declare readOnlyHint=false, destructiveHint=false, and openWorldHint=false, so the safety profile is mostly covered. The description adds that removal is 'permanent' and limited to 'owned WEBPAGE' actions, but omits what the prepare step creates (e.g., a plan id) or that a confirm call is required before any actual deletion.

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?

Single front-loaded sentence with no filler; every word contributes to scope and action.

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 mutation-prepare tool with no output schema and low schema coverage, the description is too thin: it doesn't tell the agent how prepare relates to confirm, what a successful prepare returns, or the required connection context. The agent can identify the tool but lacks the workflow context to invoke it confidently.

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 only 33% (customer_id is documented, conversion_action_id and connection_context are not). The description adds a meaningful constraint for conversion_action_id — it must reference an owned WEBPAGE conversion action — but leaves connection_context and the required format of conversion_action_id unexplained.

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 ('Prepare permanent removal') and resource ('one owned WEBPAGE conversion action'), scoping the entity type and ownership. The 'Prepare' prefix distinguishes it from the paired confirm tool, but it never names that sibling to make the two-step workflow explicit.

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 when-to-use guidance, alternatives, or prerequisites are given beyond the implied prepare-before-confirm pattern. It does not mention google_ads_conversion_action_remove_confirm or other removal-prepare siblings, leaving selection to inference.

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