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

No annotations are provided, so the description carries the full burden. It only states the action and does not disclose side effects, ownership requirements, reversibility, or the effect of the canWrite parameter on the grantee's permissions. For a tool that modifies access control, this is a significant transparency gap.

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?

The entire description is a single, front-loaded sentence with no filler. It communicates the core action efficiently, though at the cost of missing context that could be added without much bloat.

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 absence of annotations and an output schema, plus 0% parameter coverage, the one-line description is insufficient for an agent to understand the full contract of the operation: it does not cover return behavior, authorization requirements, whether sharing can be revoked, or the interpretation of optional fields like canWrite.

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 description coverage is 0% and the description does not explain any of the four parameters (owner, grantee, spaceId, canWrite). The property names in the schema offer some semantic hints, but the description adds no meaning beyond what the schema already exposes, and it does not clarify value formats or constraints.

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 uses a specific verb ('share') and identifies the resource ('memory space') and target ('another account'), making the core action clear. It does not explicitly contrast with sibling tools like open_space or write_memory, but the action of granting access is distinct enough from creating or writing to a space.

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 provides no guidance on when to use this tool instead of related tools such as open_space or write_memory. The only implicit cue is the verb 'share', but there are no explicit conditions, prerequisites, or exclusions.

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