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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered. The description adds one genuinely useful trait beyond the annotations, that invalid-value examples are bounded, but discloses nothing about auth, latency, or how progress/completion is represented.

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?

A single efficient sentence with no filler, and the key traits (progress, completion, bounded invalid values) are front-loaded. It is well-sized, though the terse phrasing sacrifices routing and parameter information that a slightly longer sentence could carry.

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?

An output schema means return values need not be explained, but with 0% parameter coverage on two required UUIDs and no link to sheets_copy_column, the agent lacks the context needed to obtain a valid jobId or decide when this call is appropriate.

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 both required parameters (jobId, sheetId) are undocumented anywhere. The description mentions a 'column copy' job indirectly but never maps meaning onto jobId or sheetId, leaving the agent to guess which UUID is the copy-job identifier versus the sheet.

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 (Read) and resource (durable column copy) plus what it reports: progress, completion, and invalid-value examples. It clearly reads as a status/result lookup, but it never names the sibling that initiates the copy (sheets_copy_column), so an agent must infer the pairing from the name alone.

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?

There is no explicit when-to-use guidance. The description implies this is a polling/result-read for a previously started column copy, but it never says to call it after sheets_copy_column, nor when to stop polling or what to do on an incomplete job.

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