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

Annotations already declare readOnlyHint, idempotentHint and non-destructive, so the safety profile needs no restating. The description adds value beyond them by disclosing what the response carries (connection_url) and what that URL is for - managing connected companies, write access, invitations and removal of access.

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 ordered well: what it returns, when to call it, what comes back. The trailing clause enumerating connection-management features is oriented toward the end user rather than the agent and is slightly longer than needed, but nothing is redundant.

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 no output schema, the description does carry the burden of describing the return value, and it names connection_url and its purpose. A caller still lacks a picture of the rest of the payload (e.g. company name/ID), but for a zero-argument lookup that is a minor gap.

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-parameter tool, so the baseline is 4. There is nothing in the schema for the description to explain, and it correctly spends no words on parameters.

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 (return the currently connected company) and scopes it with 'currently working with', which separates it from the sibling list_connected_companies. It stops short of naming that sibling as the alternative, so the differentiation is implied rather than explicit.

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?

'Call this first when you do not already know which company the person means' gives a clear ordering rule and the triggering condition, which is exactly what an agent needs before touching company-scoped tools. No explicit when-not or named fallback is given, so it does not reach 5.

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