conversations_get_email_by_id

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

Annotations already declare readOnlyHint=true, destructiveHint=false, and idempotentHint=true, so the safety profile is covered. However, the description adds no behavioral detail beyond the annotations—e.g., it doesn't state that it retrieves the full email content, whether it requires any special permissions, or what happens if the ID is invalid. Since annotations cover the safe-read aspect but the description contributes nothing extra, it falls short of the bar for a 3.

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 description is extremely short, but conciseness should not sacrifice essential information. It is under-specified and lacks any structure that would help an agent understand the tool's behavior. It reads as a fragment rather than a clear, informative sentence. Every word counts, but here there are too few words to convey meaning.

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 tool with only one parameter and no output schema, the description should at least clarify the purpose and what is returned. It does neither. An agent cannot determine what 'email' refers to, how it relates to conversations, or what the response will look like. The annotations cover safety but not the semantic details. This is a severe gap in completeness.

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 input schema describes the sole parameter 'id' as 'Path parameter id.' which is minimally informative. The tool description provides no additional guidance on the parameter's format, meaning, or usage. Even though schema coverage is 100%, the description's failure to add any context about the ID (e.g., what type of ID, where to find it) leaves the agent with no extra value. A baseline of 3 is not earned because the description doesn't supplement the sparse schema.

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 'Get email by Id' is a near-verbatim restatement of the tool name, adding no contextual detail. It names a resource (email) and an action (get), but fails to specify what kind of email, what the result includes, or how it relates to conversations. It does not distinguish from siblings like conversations_get_message or conversations_get_messages, so an agent would not know if this returns a specific email within a conversation or something else.

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 zero guidance on when to use this tool versus alternatives. No mention of scenarios, prerequisites, or exclusions. With many 'get' tools in the sibling list, the agent is left to guess which one is appropriate. This is a complete lack of usage context.

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