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

Annotations already declare readOnly=false and destructive=true, so the description only needs to add context beyond that. It does so by explaining the optional base_version_hash conflict guard and how find/replace acts naturally when the hash is omitted. This is useful behavioral detail without contradicting the 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?

The description is compact and front-loaded with the tool's core purpose and efficiency benefit. The operation list sentence is useful but partially conflicts with the schema, and the efficiency sentence overlaps somewhat with "without sending the full content." Overall it is still tight and scannable.

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?

The description, combined with the rich schema, covers purpose, efficiency, supported patch operations, and conflict handling. It is not fully complete because the described operation set contradicts the schema, leaving ambiguity about which values are actually accepted. A brief note about success/error response behavior would also help, though the schema does mention the 409 case.

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 100%, which gives a baseline of 3, and the description adds useful meaning around base_version_hash being optional and serving as a conflict guard. However, it claims support for insert_before and insert_after while the schema explicitly says operation type is only "replace" or "delete." This direct contradiction can lead an agent to construct invalid patch operations.

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: "Apply targeted changes to an existing page," and immediately distinguishes itself from full replacement by saying it avoids sending full content. This clearly differentiates it from update_page and similar sibling tools.

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?

The description gives an explicit usage context: use this for small, targeted edits because it is "much more efficient than a full replacement." It does not name the alternative tool explicitly or state hard exclusions, but the selection criterion is clear.

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