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

Annotations already declare readOnlyHint/openWorldHint/non-destructive, so the safety profile is covered. The description adds genuine value by disclosing the shape of the result (claims unique to each side, similar claims, duplicates), which matters since no output schema exists. It does not say what happens when a file is unpublished or how large the payload may be.

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 short sentences, zero filler, with the core comparison action and its result categories front-loaded ahead of the soft benefit statement.

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 two-UUID read-only tool with no output schema, the description is nearly sufficient: it names inputs' nature (published OOS files) and the returned partitions. It stops short of the edge cases (unpublished or missing file, empty comparison) that would make it fully self-contained.

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% and the schema already labels the two UUIDs ("typically yours" vs "the one to compare against"). The description adds no extra parameter semantics, so baseline 3 applies.

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+resource pair ("Compare two published OOS files side-by-side") and enumerates the three output categories, which no sibling tool offers. It is clearly distinguishable from get_oos or browse_oos, though it never names those alternatives explicitly.

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?

"Great for learning what other organizations do differently" implies a use case but gives no when-not guidance, no alternative routing, and no workflow prerequisites beyond the passing mention that files must be "published."

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