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

Annotations already declare readOnlyHint=true and openWorldHint=false. The description adds meaningful behavioral context beyond that: the tool only supplies a link and steps and performs no submission, which prevents an agent from misreading it as an application-initiating action. It stops short of describing the return format, but that is minor for a zero-param link tool.

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 short sentences, front-loaded with the resource and immediately followed by the critical scoping caveat. Every sentence earns its place with no filler.

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 zero parameters, no output schema, and read-only annotations, the definition is nearly complete: it says what is returned (link and steps) and what does not happen (no submission). Slight gap in not stating whether anything is returned when no open application exists, but that is a minor edge case.

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?

There are zero parameters and the schema is empty, so per the baseline a 4 applies. The description adds no parameter concerns because none exist.

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 returns 'the link and steps for applying for membership', a specific resource. It implicitly differentiates from the sibling get_membership_info (informational) by focusing on the application process, but never names an alternative tool directly.

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 person applies themselves; this tool submits nothing' clarifies a key usage boundary — the agent should not treat this as an action tool. However, it gives no explicit guidance on when to call this versus get_membership_info or other membership-related siblings, leaving selection to inference.

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