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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so safety is covered. The description adds genuinely new behavioral context beyond that: the host is named on the first line, each project carries a last-opened time, and locked projects exceed the plan limit and cannot be opened or edited. It does not describe ordering or result size, which keeps it below a 5.

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 front-loaded with the essential fact first (what is listed, then what the locked marker means). The parenthetical about the host name is compact and useful rather than filler, and nothing is repeated from the annotations.

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?

With no parameters, no output schema, and safety annotations in place, the description needs to convey return content and constraints — it covers project identity, last-opened timestamps, and the locked state. It is close to complete; only result ordering or volume is left unstated.

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?

The tool takes zero parameters, so the schema has nothing to explain and there is no parameter semantics to compensate for. The baseline for a parameterless tool applies; no credit or penalty is warranted.

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 gives a specific verb and resource ('Lists the user's website projects') plus scope ('on this Xodia host'), which cleanly separates it from the singular get_project. It stops short of naming any sibling explicitly, so an agent must infer the list-vs-get distinction from the names alone.

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?

Usage is only implied: an agent learns it should obtain an open project and that locked ones are unusable, which is real guidance for the follow-up step. There is no explicit statement of when to call this versus get_project or open_workspace, and no stated prerequisites.

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