LoL get timeline events

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

With no annotations, the description carries the full burden. It states 'Get' which implies read-only behavior, but there is no disclosure of other behavioral traits such as rate limits, response size, or whether the tool modifies data. The description is minimal and does not add value beyond the tool name.

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 a single, clear sentence that conveys the core functionality. It is appropriately sized for a tool with a detailed schema, though it could be slightly more informative without being verbose.

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?

Given the complexity of 7 parameters, no output schema, and no annotations, the description is insufficient. It does not explain the output format, order of events, pagination behavior, or region selection. For a filtering tool, more context on how filters interact (e.g., AND vs OR) would be helpful.

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 57%, meaning some parameters (region, matchId, eventTypes, participantId) have descriptions. The tool description mentions participant, event type, and time range, which maps to three of the seven parameters. However, it does not explain the limit, startTimeMs, or endTimeMs beyond the schema defaults. It adds some context but is not comprehensive.

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 clearly states the action (Get) and resource (timeline events), and specifies filtering by participant, event type, and time range. It distinguishes the tool from siblings like lol_get_match_timeline, which likely returns unfiltered events. However, it does not explicitly mention that the events are for a match, though the required matchId parameter implies this.

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?

No guidance is provided on when to use this tool versus alternatives (e.g., lol_get_match_timeline for full timeline). The description only states what the tool does, without explaining when filtering is beneficial or when not to use it. There is no mention of prerequisites or best practices.

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