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

With no annotations supplied, the description carries the full behavioral burden. It does disclose that the output is a copy-paste prompt pack with examples, which is genuinely useful, but it says nothing about whether the tool mutates anything, what it does with the optional query, or how the pack is returned.

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 with no repetition and the deliverable stated up front. Some promotional filler ('production-ready', 'you can run today') could be trimmed, but it is not bloated.

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?

The tool itself is simple (one optional param, no output schema), so heavy documentation is not required. Still, for a content-pack generator sharing a crowded namespace with media-mix-planner, the description should say what the pack contains and when to pick it over the planner; it does neither.

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?

There is one optional parameter whose schema description ('Optional user query to scope the analysis') is fully documented at 100% coverage, so the schema does the work. The description never mentions the query parameter or how scoping affects the generated pack, adding nothing beyond the schema; the baseline of 3 is appropriate.

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?

It states the resource ('media mix starter system') and the deliverable format ('copy-paste prompt pack with examples'), which is a concrete thing an agent can understand. However, 'starter system for marketing and operations leaders' mostly restates the name and marketing framing rather than specifying the verb and output content. It also never distinguishes itself from the closely-named sibling media-mix-planner.

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?

No when-to-use guidance is given; 'you can run today' is promotional rather than conditional. Critically, the sibling media-mix-planner covers the same subject area and the description offers no criteria for choosing between them. The agent is left to infer selection from the name alone.

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