teams_read_channel_messages

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 does disclose a meaningful behavioral trait — 'most recent posts' implies a recency-limited window rather than full history — but says nothing about how many messages are returned, pagination, ordering, or required permissions/scopes.

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 definition is short and front-loads the action, which is good. But the trailing parenthetical is literally cut off mid-word ('from te...'), so the single supplementary sentence never completes its job and the whole definition reads as incomplete rather than tight.

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 fetch with no output schema, no annotations, and an empty parameter schema, the description should at minimum pin down scope, return volume, and sibling disambiguation. It covers scope ('most recent posts') and ID provenance partially, but leaves the channel-vs-chat distinction, result size, and pagination unaddressed.

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 declares zero properties, so the baseline would normally be 4. The description does name the two identifiers an agent needs (team_id, channel_id) and where to obtain them, which is genuine value-add, but this directly conflicts with the empty schema and the channel_id provenance sentence is truncated, leaving the caller unsure how the arguments are actually supplied.

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 and resource: 'Reads the most recent posts of a Microsoft Teams channel.' That is enough to distinguish it from teams_send_channel_message, but it never differentiates itself from the close sibling teams_read_chat_messages (channel vs chat), which is the ambiguity an agent is most likely to hit.

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 parenthetical gives a useful workflow prerequisite chain ('team_id from teams_list_teams, channel_id from te...'), which implies you must list teams/channels first. However, it never states when to prefer this over teams_read_chat_messages or teams_search_messages, and the guidance is cut off before the channel_id source is complete.

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