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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered by structured data. The description adds nothing beyond that — no indication of what it calculates, how inputs are combined, or whether results are rounded/currency-agnostic. 'Client and server side' is ambiguous rather than informative.

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?

It is short, but brevity here reflects under-specification rather than economy — the single phrase contains filler ('client and server side', 'from freedailypro') while omitting the essential purpose. Nothing is front-loaded because nothing substantive is stated.

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?

A five-parameter calculation tool with no output schema, no parameter documentation, and no explanation of the computation formula is left completely opaque. The description provides no basis for an agent to construct a valid, meaningful call.

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 description coverage is 0% across five numeric parameters (venue, extras, guests, catering, costPerGuest), and the description supplies no meaning for any of them. An agent cannot tell whether 'venue' is a cost total, a headcount, or a per-unit rate, or how costPerGuest interacts with catering.

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 restates the tool name ('Event budget planner') without a specific verb or scope, and adds only vendor attribution ('from freedailypro'). The phrase 'client and server side' is implementation trivia that does not tell an agent what the tool computes or returns.

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?

There is no when-to-use guidance, no prerequisites, and no differentiation from adjacent siblings such as planning_monthly_budget, planning_split_bill, or planning_cost_of_living. The agent must infer entirely from the name that this produces an event budget breakdown.

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