ensure_active_update_set

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

Annotations already declare idempotentHint=true, openWorldHint=true, readOnlyHint=false, and destructiveHint=false. The description adds conditional creation logic ('create one automatically if none is in progress') and the '[Scripting]' context, which provides useful behavior beyond what annotations convey.

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 description is two short sentences with no redundant text. The '[Scripting]' tag is a compact, informative qualifier. Every word earns its place.

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 simple idempotent setup tool with one optional parameter and no output schema, the description covers purpose and trigger condition adequately. It does not mention return values, but none are expected, and the behavior is straightforward.

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%—the only parameter (default_name) is fully described in the schema. The tool description adds no additional parameter semantics, so the baseline score of 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?

The description clearly states the tool's function: 'Ensure an active Update Set exists; create one automatically if none is in progress.' This specific verb+resource combination distinguishes it from siblings like create_update_set (which always creates) and switch_update_set (which changes the active set).

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 when to use the tool—when an active update set is needed and auto-creation is acceptable—but it does not explicitly contrast with alternatives like switch_update_set or create_update_set, nor does it state when not to use. The usage context is implied rather than explicit.

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