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

Annotations already declare readOnlyHint=false, destructiveHint=false, openWorldHint=false, and idempotentHint=false. The description adds real behavioral context beyond them: the server auto-detects whether the input is a name or URL and enriches the entry. It omits that repeated adds are not idempotent (likely creating duplicates), which is the main remaining gap.

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 sentences, both earning their place: the first defines the action and its input flexibility, the second gives the usage trigger. Nothing is redundant or buried.

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 single-parameter mutation with no output schema, the description covers input handling and when to call it. It could go further on duplicate behavior given idempotentHint=false, but the essential information for correct invocation is present.

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 100% for the single nested 'input' parameter, so the schema already documents the name-or-URL duality. The description restates the same fact without adding format, length, or validation detail, so the baseline 3 applies.

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 (Add), resource (travel goal to the user's bucket list), and accepted input forms (plain name or URL). It is clearly distinguishable from siblings like add_destination or add_event, which target planning artifacts rather than aspirational bucket-list items.

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?

Gives an explicit usage trigger: the user mentions something they would love to do someday but is not planning right now. The contrast with planning-now implies add_destination/add_event as alternatives, but no sibling is named outright, so the routing is inferred rather than stated.

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