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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description adds context by disclosing that the checks mirror save-time validation and that visual/behavioral verification is out of scope, but it says nothing about the shape of the diagnostics or the failure behavior, so it only modestly exceeds 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?

Three tight sentences, no filler, with the core action front-loaded and the scope exclusion last. It is efficient, though the telegraphic, jargon-heavy phrasing ('focused patches', 'this staged revision') costs a little readability.

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 read-only validation tool with no output schema, an agent still needs to know what the returned diagnostics look like and how to act on them; the description gestures at 'correct diagnostics with focused patches' but doesn't close that loop. It also leaves the two required identifiers unexplained, so the definition is only minimally complete.

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% and both parameters are required, so the description carries the full burden — yet it never explains the difference between workspaceId and codeWorkspaceId or how they relate to the 'staged revision'. The phrase 'this staged revision' faintly hints that codeWorkspaceId points at a staged revision, but the ambiguity between two similar IDs is left unresolved.

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?

The description states a concrete operation — running schema, source, sandbox and controller checks on a staged revision — which is specific enough to distinguish it from neighboring tools. It also implicitly distinguishes itself from save_world_code_workspace ('the same checks used by saving') and from visual/behavioral validators. It stops short of a crisp verb+resource statement tying the checks to the world-code workspace resource.

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?

Usage is only implied: an agent can infer you run this before saving and then fix issues with focused patches. It names two adjacent workflows (saving, visual/behavioral verification) but never states explicitly when to call this versus those alternatives, nor any prerequisites.

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