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

Annotations already declare destructiveHint=true, idempotentHint=false, and openWorldHint=false, so safety is covered. The description adds genuinely new behavioral facts: all-or-nothing (atomic) validation and hard size ceilings (replace-string ≤60KB, call ≤80KB), which an agent cannot derive from structured fields.

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 compact clauses with no filler, and the defining scope ('on multiple keys') is front-loaded. The phrasing is telegraphic, but every clause carries distinct 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?

No output schema exists, and for a destructive batch mutation the key concerns — atomicity, size limits, scope — are addressed, so an agent can call it correctly. It leaves per-op semantics to the schema enum, which is a reasonable delegation.

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 75%, so the schema carries most parameter meaning. The description adds quantitative constraints tied to the replace-string op and the overall call size, which is useful, but it does not clarify any of the eight op enums or the expect/find/selector fields.

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 precise verb+resource ('patch_content on multiple keys'), which immediately distinguishes it from the sibling patch_content and from bulk_put_content/find_replace.

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 selection rule for the sibling: 'Preferred edit path for pages over 60KB,' implying plain patch_content handles the smaller cases. No explicit when-not or prerequisite/auth guidance, but the routing signal is present.

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