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 by structured data. The description's one contribution beyond that is the workspace-owner authorization requirement, a genuinely useful access constraint. It does not address result ordering, pagination, or what happens for non-owners, which is why it stays at an adequate 3.

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?

Two sentences, no filler, with the core action stated first and the permission constraint immediately after. Every clause earns its place and nothing is repeated from the title or schema.

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 single-parameter read-only list tool backed by complete annotations and full schema coverage, the definition covers purpose, scope, and access requirement. The only missing element is any hint about result volume or pagination behavior, which matters little given there is no output schema to describe.

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 100% for the single project_id parameter, including its pattern constraint, so the schema fully carries parameter semantics. The description adds no format, sourcing, or lookup hints for project_id, leaving this at the baseline for high-coverage schemas.

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 ('List') and a precisely scoped resource ('email/password accounts that can sign in to a connector project'), which is enough to separate it from add_connector_account and remove_connector_account. It stops short of naming a sibling alternative explicitly, but the read-only enumeration intent is unambiguous.

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 'Workspace owners only' gives a real precondition for invocation, which is useful routing information. However, it offers no explicit when-to-use guidance relative to adjacent read tools such as get_connector_access or get_connector_branding, so the agent must infer the boundary from tool names.

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