Conciseness

The body is short and free of concept over-explanation, but it is structurally redundant: "Core Logic" (Input Parsing → Action Execution → Success Verification) and "Instructions" (steps 1–4) restate the same three steps, and the "Invalid Target" bullet in Error Handling repeats Instructions step 3. This fits the 'mostly efficient but could be tightened' anchor — more than minor trimming is needed for a 4, but there is no padding or explanation of things Claude already knows for a 2.

Actionability

Guidance is fully executable: the literal action format `go to {target_receptacle}`, a worked example with real observation text ("go to fridge 1" → "You are at fridge 1. On the fridge 1, you see nothing."), and a concrete fallback pointer to `references/common_receptacles.md`. For an instruction-only skill this is copy-paste-ready and covers the common cases, matching the top anchor.

Workflow Clarity

The sequence is clear with explicit validation ("Confirm the action was successful by checking the observation for evidence of arrival") and a genuine feedback loop ("If the environment responds with 'Nothing happened'... formulate a new `go to` target"), plus the already-at-location edge case. As a simple single-purpose, non-destructive skill with an unambiguous action, it meets the simple-skill exception's bar for a 5; it is above the level-4 anchor because validation and error recovery are explicit, not implicit.

Progressive Disclosure

The body is well-organized into clear sections and holds a single one-level-deep reference, `references/common_receptacles.md`, which exists in the bundle and is appropriately externalized (a ~20-line receptacle lookup list) and signaled in Instructions step 3. Nothing that belongs in a separate file is inlined, matching the clear-overview anchor.

Specificity

The description lists several concrete actions in third person — "plans and executes movement", "takes a receptacle identifier as input", "executes the `go to` action", "outputs confirmation of arrival" — covering input, action, and output. It falls short of the comprehensive-coverage anchor because the action inventory is narrow and repeats the movement idea rather than enumerating fuller capability coverage.

Completeness

It explicitly answers both what ("Plans and executes movement to a target receptacle... executes the `go to` action, and outputs confirmation of arrival") and when ("Use when the agent needs to reach a specific location before interacting with objects there"), with concrete trigger phrases. This matches the anchor for explicit what AND when with concrete triggers, exceeding the level-4 anchor whose 'when' is less specific.

Trigger Term Quality

Natural trigger phrases are present — "go to fridge to cool an item", "go to garbagecan to dispose of an item", "reach a specific location" — phrasing an agent would plausibly produce. A few natural synonyms ("navigate to", "move to", "walk to") are missing, keeping it below the comprehensive-synonyms anchor.

Distinctiveness Conflict Risk

The description is scoped to "the ALFWorld environment" and to movement/navigation specifically, with object interaction explicitly framed as the follow-up rather than this skill's job, giving it a clear niche with distinct triggers and minimal conflict risk.