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

Annotations already declare readOnlyHint=true, so the safe read-only nature is covered. The description adds the underlying endpoint (GET /interactions) and the filter dimensions, but says nothing about pagination behavior, result limits, or default ordering that isn't already in the schema.

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?

One compact sentence plus an endpoint tag; the core purpose and filter scope are front-loaded with no filler. The trailing API-endpoint note is mildly redundant but not harmful.

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 read-only list tool with a fully documented schema and no output schema, the description covers purpose and filterable axes adequately. The main omission is any hint about pagination defaults (skip/take), though the schema already carries those.

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 100%, so all 8 parameters are already documented, including enums for channels and purposes. The description's mention of constituent/channel/purpose filtering maps to existing schema fields but adds no syntax, default, or format detail beyond them — the baseline 3 applies.

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?

States a specific verb (List) and resource (logged interactions) with concrete examples of what an interaction is (calls, emails, meetings, letters) and names the filterable dimensions. It is clearly distinguishable from sibling create_interaction and list_notes, though it does not explicitly contrast itself with 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?

Usage is only implied by the mention of filters — an agent can infer this is for retrieving/browsing interactions, but there is no explicit when-to-use guidance, no exclusions, and no pointer to alternatives like get_constituent_timeline or search_constituents for other retrieval needs.

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