A key stakeholder who is highly involved in the project claims that the reports sent...

The first action a project manager should take when a stakeholder deems the reports inadequate is to ensure that the reports are in line with the communications management plan. This plan outlines how project communication will occur, including the format and content of reports. By verifying compliance with the plan, the project manager can determine if the issue is due to a deviation from the agreed-upon standards or if the plan itself needs to be adjusted to meet stakeholder expectations. This step is crucial before making any changes to the reports or engaging further with the stakeholder.