package_mod

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

With no annotations, the description carries the full burden and does disclose real behavior: it writes (saves) the active mod, has a UI side effect (opens the upload panel), and hard-stops before any network upload or mod.io page creation. Not covered: whether a failed validation aborts the save, or whether existing mod data can be overwritten.

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 short sentences, action front-loaded in the first clause, and the crucial negative constraint ('never creates a mod.io page or uploads anything') placed where it will be read. Zero filler.

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 action tool this is nearly complete: an agent knows what it mutates, what it will not do, and that it returns next-step explanation. The only gap is failure semantics — what the agent should do if validation fails.

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 clarify; baseline of 4 applies. The description correctly implies a no-argument, single-action invocation.

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?

Specific verb chain and resource: it saves and validates the active mod, opens the upload panel, and returns next-step guidance. It also carves out a clear scope boundary ('stops before' the upload flow), which separates it from a pure save or pure validate action. It never names save_all or validate_mod, so sibling differentiation is implied rather than explicit.

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?

Clear context for when to reach for it (when the mod is ready to be packaged), plus an explicit when-not: it never creates a mod.io page or uploads anything, so an agent shouldn't call it expecting publication. It stops short of naming the alternative tools for save-only or validate-only workflows, which would have made this a 5.

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