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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, so the safety profile is covered. The description adds useful context that the journey is executed externally on loafy.ai with timed steps, but says nothing about auth requirements, whether a session is created server-side, or what happens on repeat calls.

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, front-loaded with the action and the returned artifact. The second sentence's 'each fold, proof and bake is timed for the baker' is mildly promotional rather than operational, but it is short and does convey that the journey is time-guided.

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?

There is no output schema, yet the description tells the agent what it gets back (a link that opens the journey at the first step), which is the main thing missing from structured fields. It is complete enough for a simple one-parameter tool, with only prerequisite/permission details absent.

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 coverage is 100% and the single slug parameter is fully documented in the schema, including its source (list_sourdough_journeys) and an example value. The description adds no parameter detail beyond that, 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 ('Start') and resource ('guided journeys') and adds the key outcome: a link that opens the journey at its first step. This distinguishes it from list_sourdough_journeys and get_sourdough_journey_step, though it doesn't explicitly name those siblings.

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 you pick 'one of' the journeys, and the schema points to list_sourdough_journeys for the slug, but the description itself gives no explicit when-to-use, prerequisites, or when-not-to-use guidance. Usage is inferable rather than stated.

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