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

With no annotations, the description carries the full burden and does add real behavioral context: an auth prerequisite (Google connect), a geographic restriction to three cities, and the persistence target (Saved tab). It omits whether a repeat save overwrites or duplicates an existing plan, and what the optional vibe/budget/interests fields actually influence.

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?

Three short sentences with the core action front-loaded and constraints appended; no filler. It could be tightened only marginally, and nothing is buried or repeated.

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 mutation-style save tool with no annotations and no output schema, the description covers action, destination, auth, and geographic bounds, which is the essential minimum. It falls short on the sibling overlap with save_outing and on the meaning of the three optional parameters, leaving gaps an agent would hit in practice.

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 only 20% (only date is annotated), so the description must compensate, and it does not. It names date and neighborhood implicitly but says nothing about vibe, budget, or interests — three parameters undocumented in both the schema and the prose.

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 and resource ('Save an outing') and the destination ('onto the signed-in user's Saved tab'), so the agent knows what the tool does. However, a near-identical sibling named save_outing exists and the description does nothing to distinguish the two, leaving the agent unable to tell them apart without opening schemas.

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 supplies two useful preconditions ('Requires Google connect', SF/Oakland/Berkeley only), which shape when the tool is callable. But it gives no guidance on when to choose this over save_outing, manage_saved_plans, or save_listing, so the selection logic is only implied.

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