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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint, covering the safety profile. The description adds value beyond annotations by clarifying the advisory nature of the content and explicitly stating it is not a permission boundary—critical context for an agent deciding how to act on the returned instructions. This is a meaningful addition that prevents misinterpretation.

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 with no filler. The action and resource are front-loaded in the first sentence, and the second adds a crucial qualifier. Every word earns its place, making this an exemplary concise definition.

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?

Given the tool's simplicity (no parameters, no output schema) and the strong annotation coverage, the description is nearly complete. It covers what the tool does and the interpretive caveat. A slight gap is the lack of detail on what the 'workspace guidance' actually contains or its format, but for a read-only getter this is minor and unlikely to hinder correct invocation.

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?

There are zero parameters, so schema coverage is trivially 100%. Per the rubric, a baseline of 4 applies when no parameters exist, and the description correctly avoids inventing parameter details. Nothing further is needed.

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?

The description states a specific verb ('Return') and resource ('current workspace guidance for connected agents'), making the tool's purpose unambiguous. It is clearly distinct from the many list/get siblings because it addresses workspace instructions rather than project data. The phrasing 'workspace guidance' is specific enough to convey intent.

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 gives clear context by clarifying that the returned guidance is advisory and not a permission boundary, which helps the agent interpret the output correctly. While it does not explicitly state when to use this tool versus alternatives, there are no obvious sibling tools with overlapping function, so the need is implied. The absence of exclusions or alternative references is acceptable given the uniqueness.

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