If the agent is acting within the authority you have given, you are bound by the agent's actions (see 10). For example, if the agent has the right to negotiate sales on your behalf, you will be obliged to fulfil the contracts.
You may also be liable, if, for example, your agent injures someone, or destroys someone's property, or if the agent makes misleading claims about your product as part of winning a sale. The law regarding your liability for the wrongful acts of your agent is complicated and legal advice should always be sought. You may of course be able to bring a claim against your agent for breach of the agency agreement if such liability arises.