Update set back out

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

Annotations already declare readOnlyHint=false, openWorldHint=true, idempotentHint=false, destructiveHint=false, so the safety profile is largely covered. The description adds real context beyond that: it explains rollback_installs as reversing the batch installation performed during commit, notes the return contains progress information, and documents a MissingParameterError. It still omits whether the back out is reversible, what permissions are required, or whether it is synchronous.

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?

The core behavior is front-loaded in a single clear sentence, followed by a structured docstring block for the two parameters, return, and one exception. The rtype/return lines are somewhat boilerplate, but there is no filler prose and the size is appropriate for a first-pass read.

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?

There is no output schema, 43 parameters with zero schema descriptions, and only two documented in the description. For an operation this large and mutation-oriented, an agent needs to know which parameters actually matter (only two are real here?) and what the effect on the update set is; the description leaves that entirely unresolved.

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% across 43 parameters, so the description carries the full burden and only explains two of them (update_set_id and rollback_installs). The explanation of rollback_installs is genuinely useful, but 41 parameters—including many plausibly irrelevant or dangerous ones—remain wholly undocumented anywhere, so the description does not compensate for the coverage gap.

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 specific verb and resource: 'Backs out an installation operation that was performed on an update set.' Combined with the title this clearly distinguishes it from siblings like update_set_commit, update_set_preview, and update_set_retrieve without needing their schemas. It stops short of a 5 because it doesn't clarify the scope/effect of the back out (what it removes, on which instance).

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 guidance on when to use this tool versus the surrounding update-set tools (commit, commit_multiple, preview, retrieve). No prerequisites, no mention of the state the update set must be in, and no conditions under which backing out is appropriate or unsafe are given.

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