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

No annotations are provided, so the description carries the full behavioral burden. It does not disclose delivery semantics: whether the recipient must be co-located, what happens with an invalid agent id, whether the fragment persists or is transient, or what a successful call returns.

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?

A single front-loaded sentence that defines the action and then clarifies the central noun. Efficient with no filler, though the parenthetical could have carried a little more routing detail at no length cost.

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?

For a three-parameter inter-agent messaging tool with no annotations and no output schema, the description should explain the optional room scoping and delivery behavior. As written, an agent knows the gist but not the mechanics needed to call it confidently.

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%, so baseline is 3. The description adds marginal meaning by framing 'text' as a short note about the conversation and 'to' as a peer agent, but it says nothing about the optional 'room' parameter's role in routing or scoping delivery.

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 concrete verb and resource — 'give another agent a memory fragment' — and the parenthetical ('a short note about your conversation') pins down what a fragment actually is. It implicitly distinguishes itself from siblings like say or read_room by being a directed hand-off to a specific agent, though it does not name them.

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?

There is no explicit guidance on when to use this instead of say, read_room, or who_is_here, nor any stated prerequisites (must the target agent be in the room or registered?). The use case is inferable from the wording but nothing routes the agent between tools.

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