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

No annotations are provided, so the description carries the full burden. It discloses the cost (80 credits), the output structure, and market focus, going beyond a basic 'creates a plan'. However, it does not describe potential limitations or side effects, which are minor for a generative planning 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?

The description is three sentences with zero fluff. The first sentence states the main purpose, the second enumerates return contents, and the third adds market and cost. Every sentence earns its place.

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?

With no output schema and no annotations, the description explains expected outputs (channel breakdown, rationale, reach, KPIs) and key context (Egyptian market, EGP, 80 credits). It is sufficiently complete for this low-to-moderate complexity tool, though it leaves the need for a budget in extra_instructions implicit.

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 schema covers all 4 parameters with descriptions, so the baseline is 3. The description adds context about channel allocation and EGP but does not explain parameter-specific semantics beyond the schema. It does not compensate for any gaps because none exist.

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 uses a specific verb ('Create') and a clear resource ('monthly media spending plan with channel budget allocation'). It further specifies the output (breakdown by channel with rationale, expected reach, and KPIs), making it distinct from sibling tools like marketing_ideas or ads_analysis.

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 usage for monthly media planning, especially for Egyptian market budgets, but it does not explicitly state when to use this tool instead of siblings like marketing_ideas or ads_analysis. No alternatives or exclusions are mentioned.

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