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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered. The description adds what the results contain (step counts, flow type, observed transitions), but says nothing about pagination, result limits, or ordering. With annotations carrying the behavioral burden, this is adequate but not rich.

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?

Front-loaded correctly with the verb and resource, and reasonably brief. However, the second sentence redundantly re-lists the flow types already enumerated in the first ('signup, onboarding, or checkout'), so not every phrase 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?

An output schema exists, so return-value detail is a bonus rather than a requirement, and the description still usefully summarizes what comes back. For a single-optional-parameter read-only listing tool this is close to complete; only the relationship to get_flow and any result-count limits are unaddressed.

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?

Only one optional parameter exists and schema coverage is 100% with an enum plus a per-value description, so the schema fully defines it. The description's enumeration of flow types loosely mirrors the enum but adds no filtering semantics (e.g. whether omitting it returns all types) beyond what the schema states. 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 and resource ('List every captured user journey') and enumerates the concrete domains covered (onboarding, signup, checkout, booking, marketplace), matching the enum in the schema. The second paragraph explicitly positions it against single-screen tools ('not just individual screens'), so an agent can distinguish it from get_screen/search_screens without opening either schema.

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 a clear use case: reach for this when you need complete multi-step journey references rather than individual screens. It does not, however, name the closest sibling (get_flow) or state any exclusion, e.g. when to prefer get_flow for a single journey or search_screens for a screen-level lookup.

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