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

Annotations already declare readOnly, idempotent, closed-world and non-destructive, so the safety bar is low. The description adds genuinely non-schema context: anonymous checks leak no private workspace data, and the status call triggers no charge, mailing, funding movement or credential disclosure. That is meaningful side-effect disclosure beyond the annotations, though the phrasing is compressed and slightly ambiguous.

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?

Three short sentences, front-loaded with the core purpose before the privacy and no-side-effect caveats. Every clause carries information, though the final 'No charge, mailing, funding or credential disclosure' is telegraphic and takes a moment to parse.

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?

With an output schema present, the description need not explain return values, and it correctly focuses on scope of checks plus privacy/side-effect guarantees. For a zero-parameter, read-only probe, this covers what an agent needs; only the lack of explicit use-case routing keeps it from full marks.

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?

Zero parameters, so baseline is 4. The description still adds framing by naming the facets returned (principal, environment, scopes, permissions), which helps an agent understand what the empty-argument call yields, without re-describing schema fields.

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 (verify) and resource (this mcp-narrow connection) and enumerates what is surfaced: workspace principal, environment, scopes, tool permissions. The name and title are restated rather than differentiated, but the enumeration of checked facets makes the tool's purpose unmistakable and distinct from the other read-ish siblings like get_workspace_settings.

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?

Usage is only implied – 'Anonymous checks reveal no private workspace data' hints it can be called pre-auth, but the description never says when to call this versus get_workspace_settings or get_credits, nor when it should be avoided. No explicit alternatives or prerequisites are named.

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