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

No annotations are provided, so the description carries the behavioral disclosure burden. It does disclose useful traits: the tool is free, ordered by arrival, and limited to the first agents on the wall. It does not describe output shape or pagination behavior, but for a simple read-style registry this is a moderate disclosure.

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?

The description is very concise and front-loads the core meaning: the Founding Machines registry, its contents, ordering, and cost. Every phrase adds value, and there is no redundant schema repetition.

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 simple tool with one optional parameter and no output schema, the description covers the resource, scope, ordering, and cost. It is sufficient for an agent to select and invoke the tool correctly, though it could clarify what fields appear in the response.

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 single parameter 'limit' is fully documented in the schema with type, min, max, and default, so schema coverage is 100%. The description adds no additional parameter meaning, which matches the baseline score of 3.

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 identifies a specific resource (the Founding Machines registry) and a clear ordering (arrival order). It does not use an explicit verb like 'list' or 'get', but 'registry' communicates that this returns the founding machines, distinguishing it from general wall tools.

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 description implies when to use the tool: to retrieve the founding machines in arrival order. However, it does not explicitly compare it to siblings like get_wall or list_unclaimed, and 'Free' is a hint but not a clear usage condition.

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