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

Annotations already indicate readOnlyHint=false and destructiveHint=false, so the agent knows this is a mutating operation. The description adds the bulk execution behavior, but does not clarify partial vs full update semantics, side effects, or authentication requirements. No contradiction with annotations.

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 short and front-loaded, but the first two sentences—'Update Workspace Auth Connection' and 'Update an auth connection'—are redundant, wasting a sentence. The bulk support note is useful and 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?

Given the high complexity of the body schema with four auth-type variants and no output schema, the description is too sparse. It does not explain update semantics, how to choose between variant schemas, or return behavior, though it does mention workspace scope and bulk support.

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 must compensate for the lack of parameter documentation. It only explains auth_connection_ids for bulk execution; the required body parameter and its complex variants (OAuth, password, token, JWT) are left entirely unexplained, and auth_connection_id and account are also undocumented.

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 uses the verb 'Update' with the resource 'Workspace Auth Connection', identifying the exact operation. It also mentions bulk support via auth_connection_ids, which distinguishes it from the create/delete/list sibling tools.

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 states it updates an auth connection and explicitly calls out bulk support for batched execution, giving useful context for when to use this capability. However, it does not explicitly contrast with create/delete/list alternatives or mention when not to use the tool.

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