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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and closed-world, so the safety envelope is covered structurally. The description still adds real value beyond them by framing the payload as 'recorded suggestions, not permission to execute them' — a trust boundary an agent could otherwise miss — and by signalling that results are paged.

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?

Two short sentences with no filler. The scope statement comes first and the safety caveat second, which is the right order for an agent scanning for what the tool returns and whether it can act on it.

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?

With no output schema, the description should say enough about the returned shape; it identifies the payload as a bounded page of suggested changes, which is adequate for a read-only list tool. It does not describe what a single 'suggested change' contains or how pagination completion is signalled, leaving a minor gap for a 3-parameter tool.

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%: url is richly documented (format, length, protected-recording handling, untrusted-content warning) while limit and offset carry no descriptions, only defaults and bounds. The phrase 'bounded page' hints that limit/offset page the results, but the description adds no detail on defaults, maximums, or how to continue paging, so it only partially compensates.

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: 'Read a bounded page of suggested changes from a screen recording.' This separates it from read_transcript and read_recording by naming the artifact (suggested changes) rather than the raw media. It stops short of naming siblings explicitly, so the differentiation is inferred rather than stated.

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 implies usage context (paginated retrieval of recorded change suggestions) but never says when to choose this over read_transcript or read_recording, nor any prerequisite such as needing the share URL first. The second sentence is a safety caveat, not routing guidance, so the agent must infer the selection rule from the resource names alone.

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