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

With no annotations supplied, the description carries the full burden. It usefully discloses that the source must be approved/published and that the copy lands in the caller's sandbox as a draft, implying the original is untouched. It says nothing about permissions, slug-collision behavior, or what the copy returns, which are significant gaps for a mutation 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 compact sentences, front-loaded with the action and result, then the parameter instruction. No filler or redundant restatement 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 four-parameter mutation with no annotations, no output schema, and zero schema description coverage, the definition covers purpose, source identification, and optional renames but omits return shape and permission/eligibility requirements. It is adequate to attempt a call but not complete enough to predict the outcome.

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 compensate: it does clarify that slug or id identifies the source and that new_name/new_slug are optional overrides. However, it does not explain precedence if both id and slug are given, whether new_slug must be unique, or what the defaults are when the renames are omitted.

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 (copy) plus resource (an approved published calculator) and the resulting artifact (a new draft in your sandbox). An agent can tell this apart from create_calculator because the source is explicitly an existing published calculator. It stops short of naming the sibling it supersedes, so it lands at 4 rather than 5.

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 phrase 'to improve' scopes the usage to modifying an existing published calculator rather than authoring one from scratch, which gives clear context. No exclusions or explicit alternatives are named (e.g. create_calculator for greenfield work), so it does not reach 5.

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