git_pull_submodules

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

The description goes beyond the bare action by disclosing key behaviors: the tool fails without touching anything if any submodule has a dirty status, and it leaves updated pointers in the working tree rather than committing. These side effects and failure semantics are valuable for an agent with no annotations to rely on.

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 three concise sentences, front-loaded with the main action, followed by precondition and outcome. Every sentence adds useful information with no redundancy or 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 parameterless tool, the description is complete: it explains what happens, the failure condition, and the resulting working-tree state. The presence of an output schema means it does not need to describe return values, and no other critical context is missing.

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 tool has zero parameters, so there is nothing for the description to disambiguate. The baseline of 4 applies here because no parameter documentation is needed.

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 tool updates every submodule of the target project to the latest commit of its remote branch. It uses a specific verb, identifies the resource, and describes the outcome, making its purpose obvious even without schema details.

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 usage context is implied: use this tool when you want to update all submodules to their latest remote commits. It also provides an important precondition (clean git status), but it does not explicitly discuss alternatives or when-not-to-use conditions beyond the clean-status requirement.

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