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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is covered. The description adds genuinely new context by enumerating the data categories returned (subscription state, budgets, renewal date, permissions, statement count), which tells the agent what information it can expect to obtain. It stops short of noting auth/linking requirements or a return format.

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?

A single sentence that front-loads the purpose and then lists the returned fields without filler. It is a dense enumeration rather than elegant prose, but nothing is wasted.

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 carries the burden of describing what comes back, and it does so by naming each returned data category. Safety behavior is already covered by annotations. The only real gap is the absence of any usage/routing context against the many sibling tools.

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?

The tool takes no parameters, so the baseline of 4 applies. The description correctly implies a parameterless lookup of the single linked account rather than something requiring an identifier.

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 names the resource (the linked AI Rechtshulp account) and enumerates exactly what the tool surfaces: subscription, shared source budget, question budget, renewal date, access-rights explanation, and saved-statement count. That is a clear retrieval purpose, though it never distinguishes itself from siblings such as check_source or list_saved, which also surface account-adjacent data.

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?

There is no indication of when to call this tool, what precondition it assumes (e.g. that an account is already linked), or which sibling to prefer for related information. The agent is left to infer usage entirely from the purpose statement.

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