ads_free_use_rules

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

No annotations are provided, so the description carries the full burden. It does disclose two behaviors beyond the name — it reads the rules text and it inspects local acceptance state — and 'Read' implies a non-mutating operation, but it does not state the return shape (rules text vs. a boolean flag), whether the rules are fetched remotely or bundled locally, or any auth requirement.

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 compact sentence with the read action front-loaded and the status-check purpose following immediately. No filler and no repetition of the tool name.

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 zero-parameter, no-output-schema tool this is nearly sufficient: an agent knows what is read and what state is evaluated. The one remaining gap is what the response actually contains, which matters because the only stated purpose is obtaining that status.

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 zero parameters, so there is nothing for the description to disambiguate; baseline is 4. The description correctly implies no inputs are needed to perform the check.

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 uses a specific verb ('Read') plus a named resource ('AdsMCP Free Use Rules') and adds a second concrete outcome: reporting whether this local installation has accepted the current version. That distinguishes the intent from a pure document fetch, though it never names the sibling ads_free_use_accept that performs the acceptance action.

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: an agent can infer this is the check-before-accept step, but the description never says when to call it versus ads_free_use_accept or whether it should precede acceptance. No exclusions or preconditions are stated.

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