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

Annotations already declare this is a non-read-only, non-destructive, closed-world write. The description adds genuine behavior beyond that: the forge starts empty, is private by default, and gets named at first build. It doesn't cover duplicate-name behavior, quotas, or whether the operation is reversible.

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 front-loaded sentences with no filler; the lifecycle fact and the default-name rule each earn their place. The parenthetical about empty expectedTreeHash is mildly tangential but useful for chaining into apply_part_changes.

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 one-parameter creation tool with no output schema, the description covers purpose, initial state, and parameter behavior. It never indicates what the response yields (e.g. a forge identifier needed by get_forge or apply_part_changes), which is the one real 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?

Schema coverage is 0%, so the description must carry the single parameter — and it does: `name` is optional, bounded at 1–120 characters, and defaults to 'Untitled forge'. Only uniqueness or character restrictions are left unspecified.

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?

States a specific verb and resource ('Start a new, private forge') and immediately clarifies the initial state, which separates it from apply_part_changes. The 'private' qualifier is meaningful given that make_forge_private and publish_forge exist as siblings.

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?

Implies the trigger condition (you need a brand-new private forge) and explains the follow-up step by naming apply_part_changes as the call that gives the forge code. It stops short of explicit exclusions, e.g. that renaming later goes through update_forge_details rather than this tool.

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