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

Annotations already establish readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the agent knows this is a safe local read. The description adds that the output is advisory ('a safe next step'), reinforcing non-mutation, but it does not disclose the classification categories or whether it can definitively resolve the error.

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?

One sentence, front-loaded with the verb and resource, zero filler. Nothing roundabout or restated from the title.

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 one-parameter, read-only tool with no output schema, the description covers the input domain but leaves the return value underspecified ('a safe next step' — a category label, a string, a fix instruction?). Since there is no output schema, the description should at least sketch what comes back.

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%, so the description is the only source of meaning, and it does clarify that errorText should be a local validation or render error rather than, say, a network failure. It says nothing about format expectations (raw stack trace vs. message) or the 10,000-character cap beyond what the schema encodes.

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 ('classify') and a specific resource ('a local validation or render error') plus an outcome ('a safe next step'), which clearly distinguishes it from the scaffolding/listing siblings. It does not explicitly name which sibling to use for non-local errors, but the domain is unmistakable.

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 phrase 'local validation or render error' implies the triggering situation is 'you have an error string', but there is no explicit when-to-use/when-not guidance and no named alternative (e.g., get_render_instructions or get_video_render_status) for cases this tool doesn't cover.

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