ue5_read_log

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

With no annotations, the description carries the behavioral burden. It discloses that the tool reads from the tail of the file, deliberately avoids loading multi-GB logs, and supports severity filtering. A minor limitation is that it mentions only Error/Warning though the schema also allows Display, but this is not a hidden side-effect or safety issue.

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?

Two focused sentences: the first states action and resource, the second adds the optional filter and the key tail-read behavior. Every sentence earns its place and there is no redundant filler.

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 simple read tool with three optional, schema-documented parameters, the description covers the main operational aspects: what is read, where from, and how large files are handled. There is no output schema, but the return value ('recent lines') is stated; a fully exhaustive description would add output format details, but this is a minor gap.

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 schema already documents all three parameters with 100% coverage, so the baseline is 3. However, the description's phrase 'filter to only Error or Warning severity' is misleading because the filter enum also includes All and Display. This actively undermines schema semantics rather than adding value.

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 identifies a specific verb (read), resource (UE5 output log), and scope (recent lines, optional severity filtering, tail-based). It is immediately distinguishable from siblings such as ue5_read_file because it names the log and the tail behavior.

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?

It gives clear context: use this tool to inspect the UE5 output log rather than arbitrary files. It does not explicitly name alternatives or exclusions, but the target use case is unambiguous and no conflicting guidance is present.

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