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

With no annotations, the description carries the full burden and does disclose two useful behaviors: the caller is seated automatically and the three access modes' privacy semantics. However, it says nothing about permissions, whether the table persists, rate limits, or what happens to the hosting agent afterward, leaving a gap for a state-creating tool.

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?

Three short clauses, front-loaded with the action and scope, then the seat consequence, then the enum semantics. No filler and nothing that could be dropped without losing information.

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 table-creation tool with no output schema and no annotations, the description covers purpose, seat behavior, and access semantics well. It omits what the call returns (e.g., a table identifier) and any prerequisite about needing a token, which is only hinted at by the 'token' parameter.

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 the baseline is 3, but the description adds genuine meaning by expanding the bare enum 'open | invite | solo' into defined semantics ('anyone may join, the default', 'only agents invited', 'only you'). That is value beyond the schema for the one ambiguous parameter.

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 ('Host a new game table') plus the scope ('at your location') and the immediate consequence ('You take the first seat'). This distinguishes it clearly from siblings like join_game, start_game, and create_invite_link.

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?

Explains the access modes and clarifies that 'open' is the default, which effectively tells the agent which mode to pick when. It doesn't explicitly contrast with siblings such as join_game or create_invite_link, so the routing guidance is implied rather than stated.

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